## ON388 - TABLE B
GRID IDENTIFICATION
(PDS Octet 7)
MASTER LIST OF NCEP STORAGE GRIDS
GRIB Edition 1 (FM92)

Revised 09/14/2006
Red text depicts changes made since 03/14/2005

VALUE | GRID | GRID INCREMENT | GRID Image
1 | 1679-point (73x23) Mercator grid with (1,1) at (0W,48.09S), (73,23) at (0W,48.09N); I increasing eastward, Equator at J=12. See GRIB Specifications | 5 degs of Longitude | GIF | PS
2 | 10512-point (144x73) global longitude-latitude grid. (1,1) at (0E, 90N), matrix layout. N.B.: prime meridian not duplicated. | 2.5 deg | GIF | PS
3 | 65160-point (360x181) global longitude-latitude grid. (1,1) at (0E, 90N), matrix layout. N.B.: prime meridian not duplicated. See GRIB Specifications | 1.0 deg | GIF | PS
4 | 259920-point (720x361) global lon/lat grid. (1,1) at (0E, 90N); matrix layout; prime meridian not duplicated | 0.5 deg | GIF | PS
5 | 3021-point (53x57) N. Hemisphere polar stereographic grid oriented 105W; Pole at (27,49). (LFM analysis) | 190.5 km at 60N | GIF | PS
6 | 2385-point (53x45) N. Hemisphere polar stereographic grid oriented 105W; Pole at (27,49). (LFM Forecast) | 190.5 km at 60N | GIF | PS
8 | 5104-point (116x44) Mercator grid with (1.1) at (3.1035E,48.67S) and (116,44) At (0.000W,61.05N); I increasing eastward, Equator at j=19. | 3.105 degs of longitude | GIF | PS
10 | 25020-point (180x139) longitude-latitude ocean grid with (1,1) at (1E,64N), (180,139) at (1W,74S); I increasing eastward, Equator at J=65 | 2 degs of Longitude and 1 deg of Latitude |  |
21 - 26 | International Exchange and Family of Services (FOS) grids. See GRIB Specifications |  |  |
27 | 4225-point (65x65) N. Hemisphere polar stereographic grid oriented 80W; Pole at (33,33). | 381 km at 60N | GIF | PS
28 | 4225-point (65x65) S. Hemisphere polar stereographic grid oriented 280E ( 80W ); Pole at (33,33). | 381 km at 60S | GIF | PS
29 | 5365-point (145x37) N. Hemisphere longitude/latitude grid for latitudes 0N to 90N; (1,1) at (0E,0N). | 2.5 degs | GIF | PS
30 | 5365-point (145x37) S. Hemisphere longitude/latitude grid for latitudes 90S to 0S; (1,1) at (0E,90S). | 2.5 degs | GIF | PS
33 | 8326-point (181x46) N. Hemisphere longitude/latitude grid for latitudes 0N to 90N; (1,1) at (0E,0N). | 2 degs | GIF | PS
34 | 8326-point (181x46) S. Hemisphere longitude/latitude grid for latitudes 90S to 0S; (1,1) at (0E,90S). | 2 degs | GIF | PS
37 - 44 | Eight lat-long 1.25x1.25 "thinned" grids, covering the globe by octants of 3447 points. For WAFS, ICAO, Family of Services (FOS), and International exchange. See GRIB Specifications |  |  |
45 | Global latitude/longitude 1.25 deg Resolution. See GRIB Specifications |  | GIF | PS
50 | Family of Services "regional grid". See GRIB Specifications |  |  |
53 | 5967-point (117x51) Mercator grid with (1,1) at (0.000W,61.05S) and (117,51) At (0.000W,61.05N); I increasing eastward, Equator at j=26. | 3.105 degs of longitude | GIF | PS
55 | 6177-point (87x71) N. Hemisphere polar stereographic grid oriented 105W; Pole at (44,38). (2/3 bedient NH sfc anl) | 254 km at 60N | GIF | PS
56 | 6177-point (87x71) N. Hemisphere polar stereographic grid oriented 105W; Pole at (40,73). (1/3 bedient NA sfc anl) | 127 km at 60N | GIF | PS
61 - 64 | International Exchange & FOS grids. See GRIB Specifications |  |  |
75 | 12321-point (111x111) N. Hemisphere Lambert Conformal grid. No fixed location; used by QLM Hurricane model. | 40 km at 30&60 deg N |  |
76 | 12321-point (111x111) S. Hemisphere Lambert Conformal grid. No fixed location; used by QLM Hurricane model. | 40 km at 30&60 deg S |  |
77 | 12321-point (111x111) N. Hemisphere Mercator grid. No fixed location; used by QLM Hurricane model. | 40 km at 22.5 deg N&S |  |
85 | 32400-point (360x90) N. Hemisphere longitude/latitude grid; longitudes: 0.5E to 359.5E (0.5W); latitudes: 0.5N to 89.5N; origin (1,1) at (0.5E,0.5N) | 1 deg | GIF | PS
86 | 32400-point (360x90) S. Hemisphere longitude/latitude grid; longitudes: 0.5E to 359.5E (0.5W); latitudes: 89.5S to 0.5S; origin (1,1) at (0.5E,89.5S) | 1 deg | GIF | PS
87 | 5022 point (81x62) N. Hemisphere polar stereographic grid oriented at 105W. Pole at (31.91, 112.53) Used for RUC. (60 km at 40N). See GRIB Specifications | 68.153 km at 60N | GIF | PS
88 | 317840 point (580x548) N. American polar stereographic grid oriented at 105W. Pole at (260.853, 613.176) Used for RSAS. (15 km at 60N). See GRIB Specifications | 15 km at 60N | GIF | PS
90 | 111723-point (223x501) Arakawa staggered E-grid on rotated latitude/longitude grid (used by the 8 km Non-hydrostatic Meso Model (NMM) - Eastern US). See GRIB Specifications |  |  |
91 | 111723-point (223x501) Arakawa staggered E-grid on rotated latitude/longitude grid (used by the 8 km NMM model - Central US). See GRIB Specifications |  |  |
92 | 111723-point (223x501) Arakawa staggered E-grid on rotated latitude/longitude grid (used by the 8 km NMM model - Western US). See GRIB Specifications |  |  |
93 | 111723-point (223x501) Arakawa staggered E-grid on rotated latitude/longitude grid (used by the 8 km NMM model - Alaska). See GRIB Specifications |  |  |
94 | 196305-point (345x569) Arakawa staggered E-grid on rotated latitude/longitude grid. See GRIB Specifications |  |  |
95 | 36062-point (146x247) Arakawa staggered E-grid on rotated latitude/longitude grid (Northwest US). See GRIB Specifications |  |  |
96 | 646602-point (606x1067) Arakawa staggered E-grid on rotated latitude/longitude grid. See GRIB Specifications |  |  |
97 | 12727-point (89x143) Arakawa staggered E-grid on rotated latitude/longitude grid (used by the 8 km NMM model - Puerto Rico). See GRIB Specifications |  |  |
98 | Global Gaussian T62 grid. See GRIB Specifications |  |  |
100 | 6889-point (83x83) N. Hemisphere polar stereographic grid oriented 105W; Pole at (40.5,88.5). (NGM Original C-Grid) | 91.452 km at 60N | GIF | PS
101 | 10283-point (113x91) N. Hemisphere polar stereographic grid oriented 105W; Pole at (58.5,92.5). (NGM "Big C-Grid") | 91.452 km at 60N | GIF | PS
103 | 3640-point (65x56) N. Hemisphere polar stereographic grid oriented 105W; Pole at (25.5,84.5) (used by ARL) | 91.452 km at 60N | GIF | PS
104 | 16170-point (147x110) N. Hemisphere polar stereographic grid oriented 105W; pole at (75.5,109.5). (NGM Super C grid) | 90.75464 km at 60N | GIF | PS
105 | 6889-point (83x83) N. Hemisphere polar stereographic grid oriented 105W; pole at (40.5,88.5). (U.S. area subset of NGM Super C grid, used by ETA model) | 90.75464 km at 60N | GIF | PS
106 | 19305 point (165x117) N. Hemisphere polar stereographic grid oriented 105W; pole at (80,176) Hi res. ETA (2 x resolution of Super C) | 45.37732 km at 60N | GIF | PS
107 | 11040 point (120x92) N. Hemisphere polar stereographic grid oriented 105W; pole at (46,167) subset of Hi res. ETA; for ETA & MAPS/RUC | 45.37732 km at 60N | GIF | PS
110 | LDAS Grid over CONUS (longitude/latitude grid) See GRIB Specifications | 1/8 degree | GIF | PS
120 | 2020800-point(1200X1684) Curvi-linear Orthogonal Grid covering the Atlantic sector, 25S to 76N & 105W to 67E. See GRIB Specifications | 2.4 to 25.25 km | GIF | PS
121 | Generic Curvilinear Orthogonal grid |  |  |
126 | Global Gaussian T126 grid See GRIB Specifications |  |  |
127 | Global Gaussian T254 grid See GRIB Specifications |  |  |
130 | Regional (CONUS) Lambert Conformal grid See GRIB Specifications | 13 km | GIF | PS
145 | Air-Quality Forecasting Northeast Intermediate Domain See GRIB Specifications | 12 km | GIF | PS
146 | Air-Quality Forecasting Northeast Output Domain See GRIB Specifications | 12 km | GIF | PS
147 | Air-Quality Forecasting Eastern "3x" Output Domain See GRIB Specifications | 12 km | GIF | PS
148 | Air-Quality Forecasting CONUS "5x" Output Domain See GRIB Specifications | 12 km | GIF | PS
160 | North Polar Stereographic grid for Alaska (Quadruple grid 203) See GRIB Specifications | 47.5 km | GIF | PS
161 | Lat/lon grid for Puerto Rico See GRIB Specifications | 0.5 degree | GIF | PS
163 | Regional (CONUS) Lambert Conformal grid See GRIB Specifications | 5 km |  |
170 | Global Gaussian T170 grid See GRIB Specifications |  |  |
171 | Northern Hemisphere High Resolution Sea Ice grid (polar stereographic) See GRIB Specifications | 12.7 km | GIF | PS
172 | Southern Hemisphere High Resolution Sea Ice grid (polar stereographic) See GRIB Specifications | 12.7 km | GIF | PS
173 | 1/12 degree global lat/lon grid See GRIB Specifications | 0.5 degree |  |
174 | Global High Resolution Sea Ice grid (longitude/latitude grid) See GRIB Specifications | 0.125 degree |  |
175 | Lat/Lon grid over Guam See GRIB Specifications | 10 km lon/lat | GIF | PS
176 | Lat/Lon grid for the US Great Lakes See GRIB Specifications | 0.050 x 0.035 degree |  |
180 | CONUS - Lat/Lon grid 17;-127;55;-45 | 12 km |  |
181 | Central America/Caribbean - Lat/Lon grid 0;-100;30;-60 | 12 km |  |
182 | Hawaii/North Pacific - Lat/Lon grid 10;-170;35;-140 | 12 km |  |
183 | Alaska - Lat/Lon grid 45;-200;75;-130 | 12 km |  |
185 | Limited domain CONUS Lambert Conformal (used by the DGEX) See GRIB Specifications | 12 km |  |
186 | Limited domain Alaska Polar Stereographic (used by the DGEX) See GRIB Specifications | 12 km |  |
190 | 12972-point (92x141) Arakawa staggered E-grid on rotated latitude/longitude grid. See GRIB Specifications |  |  |
192 | 91719-point (237x387) Arakawa staggered E-grid on rotated latitude/longitude grid. See GRIB Specifications |  |  |
194 | 12727-point (89x143) Arakawa staggered E-grid on rotated latitude/longitude grid (used by the 8 km NMM model over Hawaii). See GRIB Specifications |  |  |
198 | 41760-point (160-261) Arakawa staggered E-grid on rotated latitude/longitude grid. See GRIB Specifications |  |  |
201 | Northern Hemispheric (polar stereographic). See GRIB Specifications | 381.000 km | GIF | PS
202 | National - CONUS (polar stereographic). See GRIB Specifications | 190.500 km | GIF | PS
203 | National - Alaska (polar stereographic). See GRIB Specifications | 190.500 km | GIF | PS
204 | National - Hawaii (Mercator). See GRIB Specifications | 160.000 km | GIF | PS
205 | National - Puerto Rico (polar stereographic). See GRIB Specifications | 190.500 km | GIF | PS
206 | Regional - Central US MARD (Lambert Conformal). See GRIB Specifications | 81.2705 km | GIF | PS
207 | Regional - Alaska (polar stereographic). See GRIB Specifications | 95.250 km | GIF | PS
208 | Regional - Hawaii (Mercator). See GRIB Specifications | 80.000 km | GIF | PS
209 | Regional - NOAMIM - Intermediate Resolution North American Master Grid (Lambert Conformal). See GRIB Specifications | 44.000 km | GIF | PS
210 | Regional - Puerto Rico (Mercator). See GRIB Specifications | 80.000 km | GIF | PS
211 | Regional - CONUS (Lambert Conformal). See GRIB Specifications | 80 km | GIF | PS
212 | Regional - CONUS - Double Resolution (Lambert Conformal). See GRIB Specifications | 40.63525 km | GIF | PS
213 | National - CONUS - Double Resolution (polar stereographic). See GRIB Specifications | 95.250 km | GIF | PS
214 | Regional - Alaska - Double Resolution (polar stereographic). See GRIB Specifications | 47.625 km | GIF | PS
215 | Regional grid over the contiguous United States - Quadruple Resolution (used by the 29-km ETA Model) (Lambert Conformal). See GRIB Specifications | 20.317625 km | GIF | PS
216 | Regional grid over Alaska (polar stereographic). See GRIB Specifications | 45.000 km | GIF | PS
217 | Grid over Alaska - Double Resolution (polar stereographic). See GRIB Specifications | 22.500 km | GIF | PS
218 | Grid over the Contiguous United States (used by the 12-km ETA Model) (Lambert Conformal). See GRIB Specifications | 12.19058 km | GIF | PS
219 | Grid over the Northern Hemisphere to depict SSMI-derived ice concentrations (polar stereographic). See GRIB Specifications | 25.4 km | GIF | PS
220 | Grid over the Southern Hemisphere to depict SSMI-derived ice concentrations (polar stereographic). See GRIB Specifications | 25.4 km | GIF | PS
221 | Regional - NOAMHI - High Resolution North American Master Grid (Lambert Conformal). See GRIB Specifications | 32.46341 km | GIF | PS
222 | Regional - NOAMLO - Low Resolution North American Master Grid (Lambert Conformal). See GRIB Specifications | 88.00000 km | GIF | PS
223 | Hemispheric - Double Resolution (polar stereographic). See GRIB Specifications | 190.500 km | GIF | PS
224 | Southern Hemispheric (polar stereographic). See GRIB Specifications | 381.000 km | GIF | PS
225 | National Double Resolution - Hawaii (Mercator). See GRIB Specifications | 80.000 km | GIF | PS
226 | Regional grid over the contiguous United States - 8X Resolution (10 km) (Used by the Radar mosaics) (Lambert Conformal). See GRIB Specifications | 10.1588125 km | GIF | PS
227 | Regional grid over the contiguous United States - 16X Resolution (5 km) (Used by the Radar Stage IV precipitation analyses and Satellite-derived Precipitation Estimates) (Lambert Conformal). See GRIB Specifications | 5.07940625 km |  |
228 | Global (longitude/latitude grid). See GRIB Specifications | 2.500 degrees | GIF | PS
229 | Global (longitude/latitude grid). See GRIB Specifications | 1.000 degrees | GIF | PS
230 | Global (longitude/latitude grid). See GRIB Specifications | 0.500 degrees | GIF | PS
231 | Northern Hemisphere (longitude/latitude grid). See GRIB Specifications | 0.500 degrees | GIF | PS
232 | Northern Hemisphere (longitude/latitude grid). See GRIB Specifications | 1.000 degree | GIF | PS
233 | Regional (longitude/latitude grid). See GRIB Specifications | 1.250 X 1.000 degrees | GIF | PS
234 | Regional (longitude/latitude grid). See GRIB Specifications | 0.250 degrees | GIF | PS
235 | Global (longitude/latitude grid). See GRIB Specifications |  | GIF | PS
236 | Regional - CONUS (Lambert Conformal) See GRIB Specifications | 40.63525 km | GIF | PS
237 | Puerto Rico FAA Regional Grid (Lambert Conformal) See GRIB Specifications | 32.46341 km | GIF | PS
238 | Western North Atlantic (longitude/latitude grid) See GRIB Specifications |  | GIF | PS
239 | Alaska Regional (longitude/latitude grid) See GRIB Specifications |  | GIF | PS
240 | HRAP Grid over the Contiguous United States and Puerto Rico (polar stereographic) See GRIB Specifications | 4.7625 km |  |
241 | Regional - NOAMHI - High Resolution North American Grid (Lambert Conformal) See GRIB Specifications | 22.00000 km | GIF | PS
242 | Grid over Alaska - Quadruple Resolution Grid (polar stereographic) See GRIB Specifications | 11.25 km | GIF | PS
243 | Eastern North Pacific (longitude/latitude grid) See GRIB Specifications |  | GIF | PS
244 | North Atlantic Hurricane (longitude/latitude grid) See GRIB Specifications | 0.250 degrees | GIF | PS
245 | Regional - NOAMHI - High Resolution over Eastern US (Lambert Conformal for 8 km NMM) See GRIB Specifications | 8.00000 km | GIF | PS
246 | Regional - NOAMHI - High Resolution over Western US (Lambert Conformal for 8 km NMM) See GRIB Specifications | 8.00000 km | GIF | PS
247 | Regional - NOAMHI - High Resolution over Central US (Lambert Conformal for 8 km NMM) See GRIB Specifications | 8.00000 km | GIF | PS
248 | Puerto Rico (longitude/latitude grid) See GRIB Specifications |  | GIF | PS
249 | Grid over Alaska for 10-km Alaska nest (Polar Stereographic) See GRIB Specifications | 9.86789 km | GIF | PS
250 | Grid over Hawaii for 8 km NMM (longitude/latitude grid) See GRIB Specifications |  | GIF | PS
251 | Coastal Ocean Forecast System Grid - North Atlantic Region (longitude/latitude grid) See GRIB Specifications |  | GIF | PS
252 | Regional - CONUS (Lambert Conformal) See GRIB Specifications | 20.317625 km | GIF | PS
253 | Eastern North Pacific Regional (longitude/latitude grid) See GRIB Specifications |  | GIF | PS
254 | Mercator grid for Pacific Region See GRIB Specifications | 40 km | GIF | PS
255 | (non-defined grid - specified in the GDS) |  |  |

NOTE ON NCEP STORAGE GRIDS:
On the polar stereographic grids, the vector wind is resolved into u and v components with respect to the grid coordinates, i.e., u represents motion in the direction of increasing x (i) coordinate, v in the direction of increasing y (j). On the latitude-longitude grids, u and v are true eastward and northward components, respectively. However, take note of Table 7, below, which allows for the specification of other possibilities when the Grid Description Section is included in the message.

INTERNATIONAL EXCHANGE AND FAMILY OF SERVICES (FOS) GRIDS

VALUE | RESOLUTION lon x lat (degrees) | AREA COVERAGE (degrees) | GRID SHAPE cols rows | GRID POINTS
--- | --- | --- | --- | ---
21 | 5.0 x 2.5 | 0-180E, 0-90N | 37 | 36 + pole | 1333
22 | 5.0 x 2.5 | 180W-0, 0-90N | 37 | 36 + pole | 1333
23 | 5.0 x 2.5 | 0-180E, 90S-0 | pole + 37 | 36 | 1333
24 | 5.0 x 2.5 | 180W-0, 90S-0 | pole + 37 | 36 | 1333
25 | 5.0 x 5.0 | 0-355E, 0-90N | 72 | 18 + pole | 1297
26 | 5.0 x 5.0 | 0-355E, 90S-0 | pole + 72 | 18 | 1297
50 | 2.5 x 1.25 | (see note iv) |  |  | 964
61 | 2.0 x 2.0 | 0-180E, 0-90N | 91 | 45 + pole | 4096
62 | 2.0 x 2.0 | 180W-0, 0-90N | 91 | 45 + pole | 4096
63 | 2.0 x 2.0 | 0-180E, 90S-0 | pole + 91 | 45 | 4096
64 | 2.0 x 2.0 | 180W-0, 90S-0 | pole + 91 | 45 | 4096

NOTES ON INTERNATIONAL EXCHANGE/FOS GRIDS:
(i) The grid points are laid out in a linear array such that the longitude index (the columns) is the most rapidly varying. For the northern hemisphere grids the first point in the record is at the intersection of the western-most meridian and southern-most circle of latitude; the last point is the single polar value (see note iii, below). For the southern hemisphere grids the first point in the record is the single polar value (see note iii, below); the last point is at the intersection of the eastern-most meridian and northern-most circle of latitude. For those familiar with FORTRAN subscripting conventions, longitude is the first subscript, latitude the second.
(ii) In grids 21 through 26, and 61 through 64, the values on the shared boundaries are included in each area.
(iii) The datum for the pole point is given only once in each grid. The user must expand, if desired, the single pole point value to all the pole "points" at the pole row of a latitude-longitude grid. Scalar quantity values are the same for all pole points on a the grid. Wind components at the poles are given by the formulae: u = -speed * sin(dd) & v = -speed * cos(dd) where dd is the direction of the wind as reported according to the specification of wind direction at the poles (refer to WMO Manual on Codes, code table 878).
The WMO convention can be given this operational definition: At the North Pole, face into the wind and report the value of the west longitude meridian along which the wind is coming at you; at the South Pole do likewise but report the east longitude meridian value. This is equivalent to placing the origin of a right-handed Cartesian coordinate system on the North Pole with the y-axis pointing to the prime (0 degree) meridian and the x-axis pointing to the 90 degrees west meridian, and then resolving any vector wind at the pole point into components along those axes. At the South Pole the coordinate axes are oriented such that the y-axis points toward 180 degrees west. Those components are the u- and v-values given as the single pair of pole point winds in the GRIB format.
In terms of a longitude/latitude grid these are the wind components for the pole point at the 180 degree meridian. For example, on a 2.5x2.5 degree northern hemisphere grid (145x37 points), with the abscissa along the equator and the ordinate along the prime meridian, the transmitted north pole wind components are those that belong at the gridpoint (73,37). The wind components at the other grid points along the pole row may be obtained through suitable rotation of the coordinate system. All the components at the pole row are, of course, simply representations of the same vector wind viewed from differing (rotated) coordinate systems. In the southern hemisphere the analogous situation holds; the single set of transmitted pole point wind components belong at the gridpoint (73,1).
(iv) Grid 50 is a set of points over the contiguous United States and environs on a grid extending from 20N (row No. 1) to 60N (row No. 33) in 1.25 degree intervals. The grid increases in longitudinal extent from south to north in the following manner:
ROWS | NO. POINTS | LONGITUDINAL EXTENT
--- | --- | ---
1-4 | 22 | 122.5W - 70.0W
5-8 | 24 | 125.0W - 67.5W
9-12 | 26 | 127.5W - 65.0W
13-16 | 28 | 130.0W - 62.5W
17-20 | 30 | 132.5W - 60.0W
21-24 | 32 | 135.0W - 57.5W
25-28 | 34 | 137.5W - 55.0W
29-33 | 36 | 140.0W - 52.5W
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WAFS/ICAO/INTERNATIONAL EXCHANGE/FOS GRIDS (Grids 37 - 44)
Global Coverage of Grids Octants of the Globe
90N |
37 I | 38 J | 39 K | 40 L
41 M | 42 N | 43 O | 44 P
0
90S
| 330E | 60E | 150E | 240E | 330E |
In the figure the coordinates indicate the location of the octants of the globe, the numbers are the corresponding grid identification numbers (PDS Octet 7), and the letters are the grid identification used in the WMO heading (see Appendix A).
The left and right meridional columns of each octant/grid are shared with the neighbors.
The basic grid point separation is 1.25x1.25 deg. on a latitude/longitude array, but the grid is "thinned" by reducing the number of points in each row as one goes northward (or southward) away from the equator. In GRIB terms, this is referred to as a "quasi-regular" grid.
The latitudinal increment is always 1.25 deg.; this results in 73 rows where the pole is included as a "row", not a single gridpoint.
The longitudinal spacing at the equator is also 1.25 deg.; thus there will be 73 gridpoints at the equator in each octant.
The number of points on each latitudinal row, other than the equator, is given by (using FORTRAN notation): NPOINTS = IFIX(2.0 + (90.0/1.25) * COS(LATITUDE))
Thus at the pole there will be two gridpoints, one each at the meridians that delineate the edges of the octant. The formula was worked out so that there is (approximately) equal geographic separation between the grid points uniformly across the globe.
Because of variations in precision and roundoff error in different computers, the value of NPOINTS may vary by 1 at "critical" latitudes when calculated on various hardware platforms. Here is a table of the exact values of NPOINTS as a function of latitude as used in the internationally exchanged grids. These numbers will, of course, be found in the Grid Description Section of each GRIB bulletin.

Latitude Range inclusive (north or south) | NPOINTS | Latitude Range inclusive (north or south) | NPOINTS
--- | --- | --- | ---
0.00 - 8.75 | 73 | 55.00 | 43
10.00 - 12.50 | 72 | 56.25 | 42
13.75 - 16.25 | 71 | 57.50 | 40
17.50 - 18.75 | 70 | 58.75 | 39
20.00 - 21.25 | 69 | 60.00 | 38
22.50 | 68 | 61.25 | 36
23.75 - 25.00 | 67 | 62.50 | 35
26.25 | 66 | 63.75 | 33
27.50 - 28.75 | 65 | 65.00 | 32
30.00 | 64 | 66.25 | 30
31.25 | 63 | 67.50 | 29
32.50 | 62 | 68.75 | 28
33.75 | 61 | 70.00 | 26
35.00 - 36.25 | 60 | 71.25 | 25
37.50 | 59 | 72.50 | 23
38.75 | 58 | 73.75 | 22
40.00 | 57 | 75.00 | 20
41.25 | 56 | 76.25 | 19
42.50 | 55 | 77.50 | 17
43.75 | 54 | 78.75 | 16
45.00 | 52 | 80.00 | 14
46.25 | 51 | 81.25 | 12
47.50 | 50 | 82.50 | 11
48.75 | 49 | 83.75 | 9
50.00 | 48 | 85.00 | 8
51.25 | 47 | 86.25 | 6
52.50 | 45 | 87.50 | 5
53.75 | 44 | 88.75 | 3
|  | 90.00 | 2

When all this is put together the result is that there are 3447 points of data actually transmitted in any individual GRIB bulletin containing one octant of the globe.
In the GRIB bulletins all of this information will be included in the Grid Description Section (GDS); the GDS must be included in order to describe the thinned or "quasi-regular" grid structure. See Section 2 and Table C for the general description of the GDS; what follows are the specific values of the variables in the GDS that describe these eight grids.
GDAS Contents
Octets | Value or variable
--- | ---
1-3 | 178 (length of GDS)
4 | 0 (or 255, either indicating no PV)
5 | 33 (pointer to start of PL list)
6 | 0
7-32 | Grid description - see below
33-178 | number of points in each of 73 rows (2 octets per point)
Details of Octets 7-32 - Grid Description
Octets | Variable & Value
--- | ---
7-8 | Ni = all bits set to 1 (missing)
9-10 | Nj = 73
GRID: | 37 | 38 | 39 | 40 | 41 | 42 | 43 | 44
--- | --- | --- | --- | --- | --- | --- | --- | ---
La1 = | 0 | 0 | 0 | 0 | 90S | 90S | 90S | 90S
Lo1 = | 330 | 60 | 150 | 240 | 330 | 60 | 150 | 240
11-13
14-16
17 | Resolution & Component Flag = [10000000] (binary)
GRID: | 37 | 38 | 39 | 40 | 41 | 42 | 43 | 44
--- | --- | --- | --- | --- | --- | --- | --- | ---
La2 = | 90N | 90N | 90N | 90N | 0 | 0 | 0 | 0
Lo2 = | 60 | 150 | 240 | 330 | 60 | 150 | 240 | 330
18-20
21-23
24-25 | Di = all bits set to 1 (missing)
26-27 | Dj = 1.25 deg
28 | Scan Mode = [01000000] (binary)
29-32 | Set to 0 (unused)
Note that the scanning direction is from the bottom (south edge) to the top of the octant grids, regardless of the hemisphere. Thus in the northern hemisphere the first 73 data points (in the BDS) will be the equatorial values and the last two will be the polar values. The PL counts in the GDS octets 33-178 will, of course, indicate contain these numbers.
In the southern hemisphere, the first two data points will be the south pole values, and the last 73 points will be the equatorial values. Octets 33-34 in the GDS will contain "2", octets 35-36 will contain a "3", and so on to octets 177-178 which will contain "73".
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SELECTED NCEP GRIDS DEFINED USING GRIB SPECIFICATIONS (See Table C, in Section 2, for definition of symbols)

VALUE | GRID DESCRIPTIONS
--- | ---
1 | Tropical Strip (Mercator)
Ni | 73
Nj | 23
La1 | 48.09S
Lo1 | 0.000E
Res. & Comp. Flag | 1 0 0 0 0 0 0 0
La2 | 48.090N
Lo2 | 0.000W
Latin | 22.5
Di | 513.669 km
Dj | 513.669 km
Scanning Mode (bits 1 2 3) | 0 1 0
| The longitudinal grid spacing is 5.00 degrees.
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VALUE | GRID DESCRIPTIONS
--- | ---
3 | Global Latitude/Longitude 1 deg Resolution
Ni | 360
Nj | 181
La1 | 90.000N
Lo1 | 0.0E
Res. & Comp. Flag | 1 0 0 0 0 0 0 0
La2 | 90.000S
Lo2 | 359.000E = 1.000W
Di | 1.000 degrees
Dj | 1.000 degrees
Scanning Mode | 00000000(NB: matrix style)
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VALUE | GRID DESCRIPTIONS
--- | ---
45 | Global Latitude/Longitude 1.25 deg Resolution
Ni | 288 (prime meridian not duplicated)
Nj | 145
La1 | 90.000N
Lo1 | 0.0E
Res. & Comp. Flag | 1 0 0 0 0 0 0 0
La2 | 90.000S
Lo2 | 358.750E = 1.250W
Di | 1.250 degrees
Dj | 1.250 degrees
Scanning Mode | 00000000 (NB: matrix style)
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VALUE | GRID DESCRIPTIONS
--- | ---
87 | U.S. Area; used in MAPS/RUC (60km at 40N) (N. Hem. polar stereographic)
Nx | 81
Ny | 62
La1 | 22.8756N
Lo1 | 239.5089E = 120.4911W
Res. & Comp. Flag | 0 0 0 0 1 0 0 0
Lov | 255.000E = 105.000W
Lo2 | 0.000W
Dx | 68.153 km
Dy | 68.153 km
Projection Flag (bit 1) | 0
Scanning Mode (bits 1 2 3) | 0 1 0
Lat/lon values of the corners of the grid
(1,1) | 22.8756N, 120.4911W
(1,62) | 52.4887N, 136.5458W
(81,62) | 46.0172N, 60.8284W
(81,1) | 20.1284N, 81.2432W
Pole point
(I,J) | (31.91, 112.53)
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VALUE | GRID DESCRIPTIONS
--- | ---
88 | North American Area; used in RSAS (polar stereographic)
Nx | 580
Ny | 548
La1 | 10.000N
Lo1 | 232.000E = 128.000W
Res. & Comp. Flag | 0 0 0 0 1 0 0 0
Lov | 255.000E = 105.000W
Dx | 15.000 km
Dy | 15.000 km
Projection Flag (bit 1) | 0
Scanning Mode (bits 1 2 3) | 0 1 0
Lat/lon values of the corners of the grid
(1,1) | 10.000N, 128.000W
(1,548) | 52.648N, 179.080E
(580,548) | 45.316N, 26.542W
(580,1) | 7.885N, 77.466W
Pole point
(I,J) | (260.853, 613.176)
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VALUE | GRID DESCRIPTIONS
--- | ---
90 | Arakawa staggered E-grid on rotated latitude/longitude grid (used by the 8 km Non-hydrostatic Meso Model (NMM) - Eastern US)
Ni | 223
Nj | 501
La1 | 23.060N
Lo1 | 267.430E = 92.570W
Res. & Comp. Flag | 1 0 0 0 1 0 0 0
La2 | 37.000N
Lo2 | 280.000E = 80.000W
Di | 53 millidegrees (=24/449 deg)
Dj | 53 millidegrees (=24/449 deg)
Scanning Mode | 01000000
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VALUE | GRID DESCRIPTIONS
--- | ---
91 | Arakawa staggered E-grid on rotated latitude/longitude grid (used by the 8 km NMM model - Central US)
Ni | 223
Nj | 501
La1 | 23.060N
Lo1 | 249.430E = 110.570W
Res. & Comp. Flag | 1 0 0 0 1 0 0 0
La2 | 37.000N
Lo2 | 262.000E=98.000W
Di | 53 millidegrees (=24/449 deg)
Dj | 53 millidegrees (=1/19 deg)
Scanning Mode | 01000000
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VALUE | GRID DESCRIPTIONS
--- | ---
92 | Arakawa staggered E-grid on rotated latitude/longitude grid (used by the 8 km NMM model - Western US)
Ni | 223
Nj | 501
La1 | 25.986N
Lo1 | 232.129E = 127.871W
Res. & Comp. Flag | 1 0 0 0 1 0 0 0
La2 | 40.000N
Lo2 | 245.000E = 115.000W
Di | 53 millidegrees (=24/449 deg)
Dj | 53 millidegrees (=1/19 deg)
Scanning Mode | 01000000
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VALUE | GRID DESCRIPTIONS
--- | ---
93 | Arakawa staggered E-grid on rotated latitude/longitude grid (used by the 8 km NMM model - Alaska)
Ni | 223
Nj | 501
La1 | 45.232N
Lo1 | 190.004E = 169.996W
Res. & Comp. Flag | 1 0 0 0 1 0 0 0
La2 | 63.000N
Lo2 | 210.000E = 150.000W
Di | 67 millidegrees (=1/15 deg)
Dj | 66 millidegrees (=5/76 deg)
Scanning Mode | 01000000
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VALUE | GRID DESCRIPTIONS
--- | ---
94 | Arakawa staggered E-grid on rotated latitude/longitude grid (used by the 22 km Eta model)
Ni | 345
Nj | 569
La1 | 3.441S
Lo1 | 211.201E = 148.799W
Res. & Comp. Flag | 1 0 0 0 1 0 0 0
La2 | 50.000N
Lo2 | 249.000E = 111.000W
Di | 154 millidegrees (=53/344 deg)
Dj | 141 millidegrees (=10/71 deg)
Scanning Mode | 01000000
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VALUE | GRID DESCRIPTIONS
--- | ---
95 | Arakawa staggered E-grid on rotated latitude/longitude grid (used by the 10 km Eta model - Northwest US)
Ni | 146
Nj | 247
La1 | 35.222N
Lo1 | 228.259E = 131.747W
Res. & Comp. Flag | 1 0 0 0 1 0 0 0
La2 | 44.000N
Lo2 | 120.000E = 240.000W
Di | 67 millidegrees (=1/15 deg)
Dj | 66 millidegrees (=5/76 deg)
Scanning Mode | 01000000
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VALUE | GRID DESCRIPTIONS
--- | ---
96 | Arakawa staggered E-grid on rotated latitude/longitude grid (used by the 12 km Eta model)
Ni | 606
Nj | 1067
La1 | 3.441S
Lo1 | 211.201E = 148.799W
Res. & Comp. Flag | 1 0 0 0 1 0 0 0
La2 | 50.000N
Lo2 | 249.000E = 111.000W
Di | 88 millidegrees (=53/605 deg)
Dj | 75 millidegrees (=40/533 deg)
Scanning Mode | 01000000
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VALUE | GRID DESCRIPTIONS
--- | ---
97 | Arakawa staggered E-grid on rotated latitude/longitude grid (used by the 8 km NMM model - Puerto Rico)
Ni | 89
Nj | 143
La1 | 14.451N
Lo1 | 288.653E = 71.347W
Res. & Comp. Flag | 1 0 0 0 1 0 0 0
La2 | 18.000N
Lo2 | 293.500E = 66.500W
Di | 53 millidegrees (=24/449 deg)
Dj | 53 millidegrees (=1/19 deg)
Scanning Mode | 01000000
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VALUE | GRID DESCRIPTIONS
--- | ---
98 | Global Gaussian Latitude/Longitude T62 Resolution
Ni | 192
Nj | 94
La1 | 88.542N
Lo1 | 0.000E
Res. & Comp. Flag | 1 0 0 0 0 0 0 0
La2 | 88.542S
Lo2 | 358.125E = 1.875W
Di | 1.875 degrees
N | 47 (number of lat. circles, pole to equator)
Scanning Mode | 00000000(NB: matrix style)
Lat/lon values of the corners of the grid
(1,1) | 88.542N, 0.000E (upper left)
(1,190) | 88.542S, 0.000E
(384,190) | 88.542S, 359.0625E
(384,1) | 88.542N, 359.0625E
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VALUE | GRID DESCRIPTIONS
--- | ---
110 | LDAS Grid over CONUS (longitude/latitude grid)
Ni | 464
Nj | 224
La1 | 25.0625N
Lo1 | 235.0625E = 124.9375W
Res. & Comp. Flag | 1 0 0 0 0 0 0 0
La2 | 52.9375N
Lo2 | 292.9375E = 67.0625W
Di | 0.125 degrees
Dj | 0.125 degrees
Projection Flag (bit 1) | 0
Scanning Mode (bits 1 2 3) | 0 1 0 (NB: matrix style)
Lat/lon values of the corners of the grid
(1,1) | 25.0625N, 235.0625E
(1,224) | 52.9375N, 235.0625E
(464,224) | 52.9375N, 292.9375E
(464,1) | 25.0625N, 292.9375E
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VALUE | GRID DESCRIPTIONS
--- | ---
120 | Curvilinear Orthogonal Grid (Atlantic Sector)
Ni | 1200
Nj | 1684
Res. & Comp. Flag | 0 0 0 0 1 0 0 0
Scanning Mode | 0 1 0 0 0 0 0 0
Lat/lon values of the corners of the grid
(1,1) | 67.928E, 23.555S
(1200,1) | 49.066W, 76.466N
(1200,1684) | 105.033W, 37.141N
(1,1684) | 103.109W, 2.664N
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VALUE | GRID DESCRIPTIONS
--- | ---
126 | Global Gaussian Latitude/Longitude T126 Resolution
Ni | 384
Nj | 190
La1 | 89.277N
Lo1 | 0.000E
Res. & Comp. Flag | 1 0 0 0 0 0 0 0
La2 | 89.277S
Lo2 | 359.0625E = 0.9375W
Di | .9375 degrees
N | 95 (number of lat. circles, pole to equator)
Scanning Mode | 00000000(NB: matrix style)
Lat/lon values of the corners of the grid
(1,1) | 89.277N, 0.000E (upper left)
(1,190) | 89.277S, 0.000E
(384,190) | 89.277S, 359.0625E
(384,1) | 89.277N, 359.0625E
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VALUE | GRID DESCRIPTIONS
--- | ---
127 | Global Gaussian Latitude/Longitude T254 Resolution
Ni | 768
Nj | 384
La1 | 89.642N
Lo1 | 0.000E
Res. & Comp. Flag | 1 0 0 0 0 0 0 0
La2 | 89.642S
Lo2 | 359.531E = 0.469W
Di | 0.469 degrees
N | 192 (number of lat. circles, pole to equator)
Scanning Mode | 00000000(NB: matrix style)
Lat/lon values of the corners of the grid
(1,1) | 89.642N, 0.000E (upper left)
(1,190) | 89.642S, 0.000E
(384,190) | 89.642S, 359.531E
(384,1) | 89.642N, 359.531E
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VALUE | GRID DESCRIPTIONS
--- | ---
130 () | Regional - CONUS (Lambert Conformal) - 13 km
Nx | 451
Ny | 337
La1 | 16.281N
Lo1 | 233.862E = 126.138W
Res. & Comp. Flag | 0 0 0 0 1 0 0 0
Lov | 265.000E = 95.000W
Dx | 13.545087 km
Dy | 13.545087 km
Projection Flag | 0
Scanning Mode (bits 1 2 3) | 0 1 0
Latin 1 | 25.000N
Latin 2 | 25.000N (tangent cone)
Lat/lon values of the corners of the grid
(1,1) | 16.281N, 126.138W
(1,337) | 54.172N, 139.856W
(451,337) | 55.481N, 57.383W
(451,1) | 17.340N, 69.039W
Pole point
(I,J) | (249.315, 1051.539)
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VALUE | GRID DESCRIPTIONS
--- | ---
145 | Air-Quality Forecasting Northeast Intermediate Domain
Nx | 169
Ny | 145
La1 | 32.174N
Lo1 | 269.841E = 90.159W
Res. & Comp. Flag | 0 0 0 0 1 0 0 0
Lov | 280.500E = 79.500W
Dx | 12 km
Dy | 12 km
Projection Flag (bit 1) | 0
Scanning Mode (bits 1 2 3) | 0 1 0 (NB: matrix style)
Latin 1 | 36.000N
Latin 2 | 46.000N
Lat/lon values of the corners of the grid
(1,1) | 32.174N, 90.159W
(1,145) | 47.586N, 92.962W
(169,145) | 47.586N, 66.038W
(169,1) | 32.174N, 68.841W
Pole point
(I,J) | (85.046, 685.323)
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VALUE | GRID DESCRIPTIONS
--- | ---
146 | Air-Quality Forecasting Northeast Output Domain
Nx | 166
Ny | 142
La1 | 32.353N
Lo1 | 270.006E = 89.994W
Res. & Comp. Flag | 0 0 0 0 1 0 0 0
Lov | 280.500E = 79.500W
Dx | 12 km
Dy | 12 km
Projection Flag (bit 1) | 0
Scanning Mode (bits 1 2 3) | 0 1 0 (NB: matrix style)
Latin 1 | 36.000N
Latin 2 | 46.000N
Lat/lon values of the corners of the grid
(1,1) | 32.353N, 89.994W
(1,142) | 47.451N, 92.689W
(166,142) | 47.451N, 66.311W
(166,1) | 32.353N, 69.006W
Pole point
(I,J) | (83.551, 683.821)
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VALUE | GRID DESCRIPTIONS
--- | ---
147 | Air-Quality Forecasting Eastern "3x" Domain
Nx | 268
Ny | 259
La1 | 24.595N
Lo1 | 259.002E = 100.998W
Res. & Comp. Flag | 0 0 0 0 1 0 0 0
Lov | 263.000E = 97.000W
Dx | 12 km
Dy | 12 km
Projection Flag (bit 1) | 0
Scanning Mode (bits 1 2 3) | 0 1 0 (NB: matrix style)
Latin 1 | 33.000N
Latin 2 | 45.000N
Lat/lon values of the corners of the grid
(1,1) | 24.595N, 100.998W
(1,259) | 52.293N, 102.955W
(268,259) | 47.180N, 59.163W
(268,1) | 21.146N, 70.793W
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VALUE | GRID DESCRIPTIONS
--- | ---
148 | Air-Quality Forecasting CONUS "5x" Domain
Nx | 442
Ny | 265
La1 | 21.821N
Lo1 | 239.372E = 120.628W
Res. & Comp. Flag | 0 0 0 0 1 0 0 0
Lov | 263.000E = 97.000W
Dx | 12 km
Dy | 12 km
Projection Flag (bit 1) | 0
Scanning Mode (bits 1 2 3) | 0 1 0 (NB: matrix style)
Latin 1 | 33.000N
Latin 2 | 45.000N
Lat/lon values of the corners of the grid
(1,1) | 21.821N, 120.628W
(1,265) | 48.772N, 131.669W
(442,265) | 47.769N, 58.775W
(442,1) | 21.146N, 70.793W
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STORAGE AND TRANSMISSION GRIDS
Note: Grids 170-175 below are intended for use in the U.S. Weather Service's Advanced Weather Information Processing System (AWIPS). Their definition is subject to change as the AWIPS requirements are further refined. The parenthetical letters adjacent to the numeric values are the WMO header identification of the grid for headers starting with "Y" or "Z". For headers starting with "O", the bracketed letter is the WMO header identification for oceanographic grids. See appendix A.

VALUE | GRID DESCRIPTIONS
--- | ---
160 [Z] | 47.5 km North Polar Stereographic grid for Alaska (Quadruple grid 203)
Nx | 180
Ny | 156
La1 | 19.132N
Lo1 | 174.163E = 185.837W
Res. & Comp. Flag | 0 0 0 0 1 0 0 0
Lov | 210.000E = 150.000W
Dx | 47.500 km
Dy | 47.500 km
Projection Flag (bit 1) | 0
Scanning Mode (bits 1 2 3) | 0 1 0
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VALUE | GRID DESCRIPTIONS
--- | ---
161 [Z] | 0.5 degree lat/lon grid for Puerto Rico
Ni | 137
Nj | 102
La1 | 50.750N
Lo1 | 271.750E
Res. & Comp. Flag | 0 1 0 0 1 0 0 0
La2 | 0.250S
Lo2 | 340.250E = 19.750W
Projection Flag (bit 1) | 0
Scanning Mode (bits 1 2 3) | 0 1 0 (NB: matrix style)
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VALUE | GRID DESCRIPTIONS
--- | ---
163 () | Regional - CONUS 5 km grid
Nx | 1008
Ny | 722
La1 | 20.600N
Lo1 | 241.700E = 118.300W
Res. & Comp. Flag | 0 0 0 0 0 1 0 0
Lov | 265.000E = 95.000W
Dx | 5.000 km
Dy | 5.000 km
Projection Flag | 0
Scanning Mode (bits 1 2 3) | 0 1 0
Latin 1 | 38.000N
Latin 2 | 38.000N (tangent cone)
Lat/lon values of the corners of the grid
(1,1) | 118.3W, 20.6N
(1,722) | 71.512W, 20.555N
(1008,722) | 130.77W, 51.09N
(1008,1) | 58.958W, 51.02N
Pole point
(I,J) |
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VALUE | GRID DESCRIPTIONS
--- | ---
170 | Global Gaussian Latitude/Longitude T170 Resolution
Ni | 512
Nj | 256
La1 | 89.463N
Lo1 | 0.000E
Res. & Comp. Flag | 1 0 0 0 0 0 0 0
La2 | 89.463S
Lo2 | 359.2975E = 0.7025W
Di | degrees
N | (number of lat. circles, pole to equator)
Scanning Mode | 00000000(NB: matrix style)
Lat/lon values of the corners of the grid
(1,1) | 89.463N, 0.000E (upper left)
(1,190) | 89.463S, 0.000E
(384,190) | 89.463S, 359.2975E
(384,1) | 89.463N, 359.2975E
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VALUE | GRID DESCRIPTIONS
--- | ---
171 [Z] | Northern Hemisphere High Resolution Sea Ice Grid (polar stereographic)
Ni | 770
Nj | 930
La1 | 25.008621N
Lo1 | 240.440331E = 119.559669W
Res. & Comp. Flag | 0 1 0 0 1 0 0 0
Lov | 280.000E = 80.000W
Dx | 12.7 km at 60N
Dy | 12.7 km at 60N
Projection Flag (bit 1) | 0
Scanning Mode (bits 1 2 3) | 010 (NB: matrix style)
Lat/lon values of the corners of the grid
(1,1) | 25.008621N, 119.559669W
(1,930) | 24.401091N, 139.015594E
(770,930) | 23.906467N, 60.326862E
(770,1) | 24.561102N, 39.780396W
Pole point
(I,J) | (384.000, 462.000)
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VALUE | GRID DESCRIPTIONS
--- | ---
172 [Z] | Southern Hemisphere High Resolution Sea Ice Grid (polar stereographic)
Ni | 690
Nj | 710
La1 | 36.899599S
Lo1 | 139.805573E = 220.194427W
Res. & Comp. Flag | 0 1 0 0 1 0 0 0
Lov | 280.000E = 80.000W
Dx | 12.7 km at 60S
Dy | 12.7 km at 60S
Projection Flag (bit 1) | 1
Scanning Mode (bits 1 2 3) | 010
Lat/lon values of the corners of the grid
(1,1) | 36.899599S, 220.194427W
(1,710) | 37.726955S, 120.682312W
(690,710) | 31.025953S, 307.217285W
(690,1) | 31.717993S, 31.897572W
Pole point
(I,J) | (302.000, 362.000)
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VALUE | GRID DESCRIPTIONS
--- | ---
173 [Z] | Global 1/12 degree Lat/Lon grid
Ni | 4320
Nj | 2160
La1 | 89.958333 N
Lo1 | 0.041667 E
Res. & Comp. Flag | 1 0 0 0 0 0 0 0
La2 | 89.958333 S
Lo2 | 359.958333 E
Di | 0.083333
Dj | 0.083333
Projection Flag (bit 1) | 0
Scanning Mode (bits 1 2 3) | 010
Lat/lon values of the corners of the grid
(1,1) | 89.958336, 0.041667
(4320,1) | 89.958336, 359.958344
(1, 2160) | -89.958336, 0.041667
(4320,2160) | -89.958336, 359.958344
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VALUE | GRID DESCRIPTIONS
--- | ---
174 [Z] | Global High Resolution Sea Ice grid (longitude/latitude grid)
Ni | 2880
Nj | 1440
La1 | 89.9375N
Lo1 | 0.0625E
Res. & Comp. Flag | 0 1 0 0 1 0 0 0
La2 | 89.9375S
Lo2 | 359.9375E = 0.0625W
Di | 0.125 degrees
Dj | 0.125 degrees
Projection Flag (bit 1) | 0
Scanning Mode (bits 1 2 3) | 010 (NB: matrix style)
Lat/lon values of the corners of the grid
(1,1) | 89.9375N, 0.0625E
(1,1440) | 89.9375S, 0.0625E
(2880,1440) | 89.9375S, 359.9375E
(2880,1) | 89.9375N, 359.9375E
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VALUE | GRID DESCRIPTIONS
--- | ---
175 (C) | Grid over Guam (10 km longitude/latitude grid)
Ni | 556
Nj | 334
La1 | 0.000N
Lo1 | 130.000E
La2 | 30.060N
Lo2 | 180.040E
Di | 0.09 degrees
Dj | 0.09 degrees
Res. & Comp. Flag | 1 0 0 0 0 0 0 0
Scanning Mode (bits 1 2 3) | 0 1 0 (NB: matrix style)
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VALUE | GRID DESCRIPTIONS
--- | ---
176 () | 0.050 x 0.035 degree lat/lon grid for the US Great Lakes
Ni | 327
Nj | 235
La1 | 40.91 N
Lo1 | 267.8 E = 92.2 W
Res. & Comp. Flag | 1 0 0 0 0 0 0 0
La2 | 49.1 N
Lo2 | 284.1 E = 75.9 W
Di | 0.050
Dj | 0.035
Projection Flag (bit 1) | 0
Scanning Mode (bits 1 2 3) | 0 1 0 (NB: matrix style)
Lat/Lon values of the corners of the grid
(1,1) | 40.910 N, 267.800 E
(1,235) | 49.100 N, 267.800 E
(327,235) | 49.100 N, 284.100 E
(327,1) | 40.910 N, 284.100 E
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VALUE | GRID DESCRIPTIONS
--- | ---
185 (C) | 12 km LCC limited domain CONUS grid (used by DGEX)
Ni | 491
Nj | 303
Pojection Angles | 40.00, -98.00, 40.00
Dx | 12 km at 40 N
Dy | 12 km at 40 N
Grid Bounds | (19.9433, -125.0932)(49.8812, -56.2855)
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VALUE | GRID DESCRIPTIONS
--- | ---
186 (C) | 12 km PSG limited domain Alaska grid (used by DGEX)
Ni | 377
Nj | 237
Pojection Angles | 90.00, -157.00, 0.00
Dx | 12 km at 61 N
Dy | 12 km at 61 N
Grid Bounds | (44.1960, -185.2411)(64.8206, -104.2081)
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VALUE | GRID DESCRIPTIONS
--- | ---
190 | Arakawa staggered E-grid on rotated latitude/longitude grid (used by the 80 km Eta model)
Ni | 92
Nj | 141
La1 | 0.182N
Lo1 | 210.113E = 149.887W
Res. & Comp. Flag | 1 0 0 0 1 0 0 0
La2 | 52.000N
Lo2 | 249.000E = 111.000W
Di | 577 millidegrees (=15/26 deg)
Dj | 538 millidegrees (=14/26 deg)
Scanning Mode | 01000000
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VALUE | GRID DESCRIPTIONS
--- | ---
192 | Arakawa staggered E-grid on rotated latitude/longitude grid (used by the 32 km Eta model)
Ni | 237
Nj | 387
La1 | 3.441S
Lo1 | 211.201E = 148.799W
Res. & Comp. Flag | 1 0 0 0 1 0 0 0
La2 | 50.000N
Lo2 | 249.000E = 111.000W
Di | 225 millidegrees (=53/236 deg)
Dj | 207 millidegrees (=40/193 deg)
Scanning Mode | 01000000
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VALUE | GRID DESCRIPTIONS
--- | ---
194 | Arakawa staggered E-grid on rotated latitude/longitude grid (used by the 8 km NMM model over Hawaii)
Ni | 89
Nj | 143
La1 | 16.444N
Lo1 | 197.756E = 162.244W
Res. & Comp. Flag | 1 0 0 0 1 0 0 0
La2 | 20.250N
Lo2 | 202.650E = 157.350W
Di | 53 millidegrees (=24/449 deg)
Dj | 53 millidegrees (=1/15 deg)
Scanning Mode | 01000000
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VALUE | GRID DESCRIPTIONS
--- | ---
198 | Arakawa staggered E-grid on rotated latitude/longitude grid (used by the 48 km Eta model)
Ni | 160
Nj | 261
La1 | 3.441S
Lo1 | 211.201E = 148.799W
Res. & Comp. Flag | 1 0 0 0 1 0 0 0
La2 | 50.000N
Lo2 | 249.000E = 111.000W
Di | 333 millidegrees (=1/3 deg)
Dj | 308 millidegrees (=4/13 deg)
Scanning Mode | 01000000
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STORAGE AND TRANSMISSION GRIDS
Note: The following grids are intended for use in the U.S. Weather Service's Advanced Weather Information Processing System (AWIPS). Their definition is subject to change as the AWIPS requirements are further refined. The parenthetical letters adjacent to the numeric values are the WMO header identification of the grid for headers starting with "Y" or "Z". For headers starting with "O", the bracketed letter is the WMO header identification for oceanographic grids. See appendix A.

VALUE | GRID DESCRIPTIONS
--- | ---
201 (A) | Northern Hemispheric (polar stereographic)
Nx | 65
Ny | 65
La1 | -20.826N = 20.826S
Lo1 | 210.000E = 150.000W
Res. & Comp. Flag | 0 0 0 0 1 0 0 0
Lov | 255.000E = 105.000W
Dx | 381.000 km
Dy | 381.000 km
Projection Flag (bit 1) | 0
Scanning Mode (bits 1 2 3) | 0 1 0
Pole point
(I,J) | (33, 33)
| Note: Map 201 is the same as NCEP storage grid 27, except it is rotated to 105 deg. orientation.
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VALUE | GRID DESCRIPTIONS
--- | ---
202 (I) | National - CONUS (polar stereographic)
Nx | 65
Ny | 43
La1 | 7.838N
Lo1 | 218.972E = 141.028W
Res. & Comp. Flag | 0 0 0 0 1 0 0 0
Lov | 255.000E = 105.000W
Dx | 190.500 km
Dy | 190.500 km
Projection Flag (bit 1) | 0
Scanning Mode (bits 1 2 3) | 0 1 0
Lat/lon values of the corners of the grid
(1,1) | 7.838N, 141.028W
(1,43) | 35.616N, 168.577E
(65,43) | 35.617N, 18.576W
(65,1) | 7.838N, 68.973W
Pole point
(I,J) | (33, 45)
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VALUE | GRID DESCRIPTIONS
--- | ---
203 (J) | National - Alaska (polar stereographic)
Nx | 45
Ny | 39
La1 | 19.132N
Lo1 | 174.163E = 185.837W
Res. & Comp. Flag | 0 0 0 0 1 0 0 0
Lov | 210.000E = 150.000W
Dx | 190.500 km
Dy | 190.500 km
Projection Flag (bit 1) | 0
Scanning Mode (bits 1 2 3) | 0 1 0
Lat/lon values of the corners of the grid
(1,1) | 19.132N, 174.163E
(1,39) | 44.646N, 115.601E
(45,39) | 57.634N, 53.660W
(45,1) | 24.361N, 123.434W
Pole point
(I,J) | (27, 37)
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VALUE | GRID DESCRIPTIONS
--- | ---
204 (K) | National - Hawaii (Mercator)
Ni | 93
Nj | 68
La1 | 25.000S
Lo1 | 110.000E
Res. & Comp. Flag | 1 0 0 0 0 0 0 0
La2 | 60.644N
Lo2 | 109.129W
Latin | 20.000
Scanning Mode (bits 1 2 3) | 0 1 0
Di | 160.000 km
Dj | 160.000 km
Lat/lon values of the corners of the grid
(1,1) | 25.000S, 110.000E
(1,68) | 60.644N, 110.000E
(93,68) | 60.644N, 109.129W
(93,1) | 25.000S, 109.129W
| The longitudinal grid spacing is 1.531 degrees.
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VALUE | GRID DESCRIPTIONS
--- | ---
205 (L) | National - Puerto Rico (polar stereographic)
Nx | 45
Ny | 39
La1 | 0.616N
Lo1 | 275.096E = 84.904W
Res. & Comp. Flag | 0 0 0 0 1 0 0 0
Lov | 300.000E = 60.000W
Dx | 190.500 km
Dy | 190.500 km
Projection Flag (bit 1) | 0
Scanning Mode (bits 1 2 3) | 0 1 0
Lat/lon values of the corners of the grid
(1,1) | 0.616N, 84.904W
(1,39) | 36.257N, 115.304W
(45,39) | 45.620N, 15.000W
(45,1) | 3.389N, 42.181W
Pole point
(I,J) | (27, 57)
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VALUE | GRID DESCRIPTIONS
--- | ---
206 | Regional - Central US MARD (Lambert Conformal)
Nx | 51
Ny | 41
La1 | 22.289N
Lo1 | 242.009E = 117.991W
Res. & Comp. Flag | 0 0 0 0 1 0 0 0
Lov | 265.000E = 95.000W
Dx | 81.2705 km
Dy | 81.2705 km
Projection Flag | 0 (not bipolar)
Scanning Mode (bits 1 2 3) | 0 1 0
Latin1 | 25.000N
Latin2 | 25.000N (tangent cone)
Lat/lon values of the corners of the grid
(1,1) | 22.289N, 117.991W
(1,41) | 50.081N, 124.898W
(51,41) | 51.072N, 73.182W
(51,1) | 23.142N, 78.275W
Pole point
(I,J) | (30.000, 169.745)
| The Dx, Dy grid increment (at 25 deg north) was selected so that the grid spacing would be exactly 80.000 km at 35 deg north; the intersection of 35N & 95W falls on point (30,16).
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VALUE | GRID DESCRIPTIONS
--- | ---
207 (N) | Regional - Alaska (polar stereographic)
Nx | 49
Ny | 35
La1 | 42.085N
Lo1 | 184.359E = 175.641W
Res. & Comp. Flag | 0 0 0 0 1 0 0 0
Lov | 210.000E = 150.000W
Dx | 95.250 km
Dy | 95.250 km
Projection Flag (bit 1) | 0
Scanning Mode (bits 1 2 3) | 0 1 0
Lat/lon values of the corners of the grid
(1,1) | 42.085N, 175.641W
(1,35) | 63.976N, 153.689E
(49,35) | 63.976N, 93.689W
(49,1) | 42.085N, 124.359W
Pole point
(I,J) | (25, 51)
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VALUE | GRID DESCRIPTIONS
--- | ---
208 (O) | Regional - Hawaii (Mercator)
Ni | 29
Nj | 27
La1 | 9.343N
Lo1 | 192.685E = 167.315W
Res. & Comp. Flag | 1 0 0 0 0 0 0 0
La2 | 28.092N
Lo2 | 145.878W
Latin | 20.000
Scanning Mode (bits 1 2 3) | 0 1 0
Di | 80.000 km
Dj | 80.000 km
Lat/lon values of the corners of the grid
(1,1) | 9.343N, 167.315W
(1,27) | 28.092N, 167.315W
(29,27) | 28.092N, 145.878W
(29,1) | 9.343N, 145.878W
| The longitudinal grid spacing is 0.766 degrees. The grid is positioned such that the odd-numbered rows and columns coincide with the National grid, No. 204; the lower left corner of the regional grid is located at National (204) grid-point (55,24) and the upper right corner is located at (69,37).
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VALUE | GRID DESCRIPTIONS
--- | ---
209 | Regional - NOAMIM - Intermediate Resolution North American Master Grid (Lambert Conformal)
Nx | 275
Ny | 223
La1 | 4.850S
Lo1 | 208.900E = 151.100W
Res. & Comp. Flag | 0 0 0 0 1 0 0 0
Lov | 249.000E = 111.000W
Dx | 44.00000 km
Dy | 44.00000 km
Projection Flag | 0 (not bipolar)
Scanning Mode (bits 1 2 3) | 0 1 0
Latin1 | 45.000N
Latin2 | 45.000N (tangent cone)
Lat/lon values of the corners of the grid
(1,1) | 4.850S, 151.100W
(1,223) | 47.094N, 139.472W
(275,223) | 46.455N, 1.266W
(275,1) | 5.072N, 70.490W
Pole point
(I,J) | (137.173, 253.319)
| The intersection of 45N & 111W falls on point (137.173, 108.195).
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VALUE | GRID DESCRIPTIONS
--- | ---
210 | Regional - Puerto Rico (Mercator)
Ni | 25
Nj | 25
La1 | 9.000N
Lo1 | 283.000E = 77.000W
Res. & Comp. Flag | 1 0 0 0 0 0 0 0
La2 | 26.422N
Lo2 | 58.625W
Latin | 20.000
Scanning Mode (bits 1 2 3) | 0 1 0
Di | 80.000 km
Dj | 80.000 km
Lat/lon values of the corners of the grid
(1,1) | 9.000N, 77.000W
(1,25) | 26.422N, 77.000W
(25,25) | 26.422N, 58.625W
(25,1) | 9.000N, 58.626W
| The longitudinal grid spacing is 0.766 degrees.
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VALUE | GRID DESCRIPTIONS
--- | ---
211 (Q) | Regional - CONUS (Lambert Conformal)
Nx | 93
Ny | 65
La1 | 12.190N
Lo1 | 226.541E = 133.459W
Res. & Comp. Flag | 0 0 0 0 1 0 0 0
Lov | 265.000E = 95.000W
Dx | 81.2705 km
Dy | 81.2705 km
Projection Flag | 0 (not bipolar)
Scanning Mode (bits 1 2 3) | 0 1 0
Latin1 | 25.000N
Latin2 | 25.000N (tangent cone)
Lat/lon values of the corners of the grid
(1,1) | 12.190N, 133.459W
(1,65) | 54.536N, 152.856W
(93,65) | 57.290N, 49.385W
(93,1) | 14.335N, 65.091W
Pole point
(I,J) | (53.000, 178.745)
| The Dx, Dy grid increment (at 25 deg north) was selected so that the grid spacing would be exactly 80.000 km at 35 deg north; the intersection of 35N & 95W falls on point (53,25).
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VALUE | GRID DESCRIPTIONS
--- | ---
212 (R)[R] | Regional - CONUS - Double Resolution (Lambert Conformal)
Nx | 185
Ny | 129
La1 | 12.190N
Lo1 | 226.541E = 133.459W
Res. & Comp. Flag | 0 0 0 0 1 0 0 0
Lov | 265.000E = 95.000W
Dx | 40.63525 km
Dy | 40.63525 km
Projection Flag | 0 (not bipolar)
Scanning Mode (bits 1 2 3) | 0 1 0
Latin1 | 25.000N
Latin2 | 25.000N (tangent cone)
Lat/lon values of the corners of the grid
(1,1) | 12.190N, 133.459W
(1,129) | 54.536N, 152.856W
(185,129) | 57.290N, 49.385W
(185,1) | 14.335N, 65.091W
Pole point
(I,J) | (105.000, 356.490)
| The Dx, Dy grid increment (at 25 deg north) was selected so that the grid spacing would be exactly 40.000 km at 35 deg north; the intersection of 35N & 95W falls on point (105,49).
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VALUE | GRID DESCRIPTIONS
--- | ---
213 (H) | National - CONUS - Double Resolution (polar stereographic)
Nx | 129
Ny | 85
La1 | 7.838N
Lo1 | 218.972E = 141.028W
Res. & Comp. Flag | 0 0 0 0 1 0 0 0
Lov | 255.000 = 105.000W
Dx | 95.250 km
Dy | 95.250 km
Projection Flag (bit 1) | 0
Scanning Mode (bits 1 2 3) | 0 1 0
Lat/lon values of the corners of the grid
(1,1) | 7.838N, 141.028W
(1,85) | 35.617N, 168.577E
(129,85) | 35.617N, 18.577W
(129,1) | 7.838N, 68.973W
Pole point
(I,J) | (65, 89)
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VALUE | GRID DESCRIPTIONS
--- | ---
214 ()[T] | Regional - Alaska - Double Resolution (polar stereographic)
Nx | 97
Ny | 69
La1 | 42.085N
Lo1 | 184.359E = 175.641W
Res. & Comp. Flag | 0 0 0 0 1 0 0 0
Lov | 210.000E = 150.000W
Dx | 47.625 km
Dy | 47.625 km
Projection Flag (bit 1) | 0
Scanning Mode (bits 1 2 3) | 0 1 0
Lat/lon values of the corners of the grid
(1,1) | 42.085N, 175.641W
(1,69) | 63.975N, 153.690E
(97,69) | 63.975N, 93.689W
(97,1) | 42.085N, 124.358W
Pole point
(I,J) | (49, 101)
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VALUE | GRID DESCRIPTIONS
--- | ---
215 (U)[U] | grid over the contiguous United States - Quadruple Resolution (used by the 29-km eta model)(Lambert Conformal)
Nx | 369
Ny | 257
La1 | 12.190N
Lo1 | 226.514E = 133.459W
Res. & Comp. Flag | 0 0 0 0 1 0 0 0
Lov | 265.000E = 95.000W
Dx | 20.317625 km
Dy | 20.317625 km
Projection Flag | 0 (not bipolar)
Scanning Mode (bits 1 2 3) | 0 1 0
Latin1 | 25.000N
Latin2 | 25.000N (tangent cone)
Lat/lon values of the corners of the grid
(1,1) | 12.190N, 133.459W
(1,129) | 54.536N, 152.856W
(185,129) | 57.290N, 49.385W
(185,1) | 14.335N, 65.091W
Pole point
(I,J) | (209.000, 711.980)
| The Dx, Dy grid increment (at 25 deg north) was selected so that the grid spacing would be exactly 20.000 km at 35 deg north; the intersection of 35N & 95W falls on point (209,97).
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VALUE | GRID DESCRIPTIONS
--- | ---
216 (V)[V] | grid over Alaska (polar stereographic)
Nx | 139
Ny | 107
La1 | 30.000N
Lo1 | 187.000E = 173.000W
Res. & Comp. Flag | 0 0 0 0 1 0 0 0
Lov | 225.000E = 135.000W
Dx | 45.000 km
Dy | 45.000 km
Projection Flag (bit 1) | 0
Scanning Mode (bits 1 2 3) | 0 1 0
Lat/lon values of the corners of the grid
(1,1) | 30.000N, 173.000W
(1,107) | 50.454N, 143.597E
(139,107) | 70.111N, 62.850W
(139,1) | 38.290N, 114.856W
Pole point
(I,J) | (94.909, 121.198)
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VALUE | GRID DESCRIPTIONS
--- | ---
217 (Y) | Grid over Alaska - Double Resolution grid (polar stereographic)
Nx | 277
Ny | 213
La1 | 30.000N
Lo1 | 187.000E = 173.000W
Res. & Comp. Flag | 0 0 0 0 1 0 0 0
Lov | 225.000E = 135.000W
Dx | 22.500 km
Dy | 22.500 km
Projection Flag (bit 1) | 0
Scanning Mode (bits 1 2 3) | 0 1 0
Lat/lon values of the corners of the grid
(1,1) | 30.000N, 173.000W
(1,213) | 50.454N, 143.597E
(277,213) | 70.111N, 62.850W
(277,1) | 38.290N, 114.856W
Pole point
(I,J) | (188.818, 241.397)
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VALUE | GRID DESCRIPTIONS
--- | ---
218 (B)[B] | Grid over the Contiguous United States (used by the 12-km Eta Model) (Lambert Conformal)
Nx | 614
Ny | 428
La1 | 12.190N
Lo1 | 226.514E = 133.459W
Res. & Comp. Flag | 0 0 0 0 1 0 0 0
Lov | 265.000E = 95.000W
Dx | 12.19058 km
Dy | 12.19058 km
Projection Flag (bit 1) | 0 (not bipolar)
Scanning Mode (bits 1 2 3) | 0 1 0
Lat/lon values of the corners of the grid
(1,1) | 12.190N, 133.459W
(1,428) | 54.564N, 152.878W
(614,428) | 57.328N, 49.420W
(614,1) | 14.342N, 65.127W
Pole point
(I,J) | (347.668, 1190.097)
| The Dx, Dy grid increment (at 25 deg north) was selected so that the grid spacing would be exactly 12.000 km at 35 deg north; the intersection of 35N & 95W falls on point (347.668, 160.999)
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VALUE | GRID DESCRIPTIONS
--- | ---
219 ()[C] | grid over the Northern Hemisphere to depict SSMI-derived ice concentrations (polar stereographics)
Nx | 385
Ny | 465
La1 | 25.008N
Lo1 | 240.441E = 119.559W
Res. & Comp. Flag | 0 1 0 0 1 0 0 0
Lov | 280.000E = 80.000W
Dx | 25.4 km at 60N
Dy | 25.4 km at 60N
Projection Flag (bit 1) | 0
Scanning Mode (bits 1 2 3) | 0 1 0
Lat/lon values of the corners of the grid
(1,1) | 25.008N, 119.559W
(1,465) | 24.468N, 139.075E
(385,465) | 24.028N, 60.339E
(385,1) | 24.561N, 39.853W
Pole point
(I,J) | (191.000, 231.000)
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VALUE | GRID DESCRIPTIONS
--- | ---
220 ()[D] | grid over the Southern Hemisphere to depict SSMI-derived ice concentrations (polar stereographics)
Nx | 345
Ny | 355
La1 | 36.889S
Lo1 | 139.806E = 220.194W
Res. & Comp. Flag | 0 1 0 0 1 0 0 0
Lov | 280.000E = 80.000W
Dx | 25.4 km at 60S
Dy | 25.4 km at 60S
Projection Flag (bit 1) | 1
Scanning Mode (bits 1 2 3) | 0 1 0
Lat/lon values of the corners of the grid
(1,1) | 36.899S, 139.806E
(1,355) | 37.801S, 120.763W
(345,355) | 31.850S, 31.899W
(345,1) | 31.094S, 52.857E
Pole point
(I,J) | (151.000, 181.000)
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VALUE | GRID DESCRIPTIONS
--- | ---
221 ()[E] | Regional - NOAMHI - High Resolution North American Master Grid (Lambert Conformal)
Nx | 349
Ny | 277
La1 | 1.000N
Lo1 | 214.500E = 145.500W
Res. & Comp. Flag | 0 0 0 0 1 0 0 0
Lov | 253.000E = 107.000W
Dx | 32.46341 km
Dy | 32.46341 km
Projection Flag (bit 1) | 0
Scanning Mode (bits 1 2 3) | 0 1 0
Latin1 | 50.000N
Latin2 | 50.000N
Lat/lon values of the corners of the grid
(1,1) | 1.000N, 145.500W
(1,277) | 46.635N, 148.639E
(349,277) | 46.352N, 2.566W
(349,1) | 0.897N, 68.318W
Pole point
(I,J) | (174.507, 307.764)
| The Dx, Dy grid increment (at 50 deg north) was selected so that the grid spacing would be exactly 32.000 km at 40 deg north; the intersection of 40N & 107W falls on point (174.507,108.664)
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VALUE | GRID DESCRIPTIONS
--- | ---
222 | Regional - NOAMLO - Low Resolution North American Master Grid (Lambert Conformal)
Nx | 138
Ny | 112
La1 | -4.850N = 4.850S
Lo1 | 208.900E = 151.100W
Res. & Comp. Flag | 0 0 0 0 1 0 0 0
Lov | 249.000E = 111.000W
Dx | 88.00000 km
Dy | 88.00000 km
Projection Flag (bit 1) | 0
Scanning Mode (bits 1 2 3) | 0 1 0
Latin1 | 45.000N
Latin2 | 45.000N
Lat/lon values of the corners of the grid
(1,1) | 4.850S, 151.100W
(1,112) | 47.094N, 139.472E
(138,112) | 46.455N, 1.266W
(138,1) | 5.072S, 70.490W
Pole point
(I,J) | (69.086, 127.160)
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VALUE | GRID DESCRIPTIONS
--- | ---
223 | Hemispheric - Double Resolution (Lambert Conformal)
Nx | 129
Ny | 129
La1 | -20.826N = 20.826S
Lo1 | 210.000E = 150.000W
Res. & Comp. Flag | 0 0 0 0 1 0 0 0
Lov | 255.000E = 105.000W
Dx | 190.500 km
Dy | 190.500 km
Projection Flag (bit 1) | 0
Scanning Mode (bits 1 2 3) | 0 1 0
Pole point
(I,J) | (65.000, 65.000)
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VALUE | GRID DESCRIPTIONS
--- | ---
224 | Southern Hemispheric (polar stereographic)
Nx | 65
Ny | 65
La1 | 20.826N
Lo1 | 120.000E
Res. & Comp. Flag | 0 0 0 0 1 0 0 0
Lov | 105.000W
Dx | 381.000 km
Dy | 381.000 km
Projection Flag (bit 1) | 1
Scanning Mode (bits 1 2 3) | 0 1 0
Lat/lon values of the corners of the grid
(1,1) | 20.826N, 120.000E
(1,65) | 20.826N, 150.000W
(65,65) | 20.826N, 60.000W
(65,1) | 20.826N, 30.000E
Pole point
(I,J) | (33, 33)
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VALUE | GRID DESCRIPTIONS
--- | ---
225 | National Double Resolution - Hawaii (Mercator)
Ni | 185
Nj | 135
La1 | 25.000S
Lo1 | 110.000E = 250.000W
Res. & Comp. Flag | 1 0 0 0 0 0 0 0
La2 | 60.64N
Lo2 | 109.129W = 250.871E
Latin | 20.000
Scanning Mode (bits 1 2 3) | 0 1 0
Di | 80.000 km
Dj | 80.000 km
Lat/lon values of the corners of the grid
(1,1) | 25.000S, 110.000E
(1,68) | 60.644N, 110.000E
(93,68) | 60.644N, 109.129W
(93,1) | 25.000S, 109.129W
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VALUE | GRID DESCRIPTIONS
--- | ---
226 (M) | grid over the contiguous United States - 8X Resolution (10 km) (Used by the Radar mosaics) (Lambert Conformal)
Nx | 737
Ny | 517
La1 | 12.190N
Lo1 | 226.514E = 133.459W
Res. & Comp. Flag | 0 0 0 0 1 0 0 0
Lov | 265.000E = 95.000W
Dx | 10.1588125 km
Dy | 10.1588125 km
Projection Flag (bit 1) | 0 (not bipolar)
Scanning Mode (bits 1 2 3) | 0 1 0
Latin1 | 25.000N
Latin2 | 25.000N (tangent cone)
Lat/lon values of the corners of the grid
(1,1) | 12.190N, 133.459W
(1,129) | 54.536N, 152.856W
(185,129) | 57.290N, 49.385W
(185,1) | 14.335N, 65.091W
Pole point
(I,J) | (209.000, 711.980)
| The Dx, Dy grid increment (at 25 deg north) was selected so that the grid spacing would be exactly 20.000 km at 25 deg north; the intersection of 35N & 95W falls on point (209,97).
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VALUE | GRID DESCRIPTIONS
--- | ---
227 | grid over the contiguous United States - 16X Resolution (5 km) (Used by the Radar Stage IV precipitation analyses and Satellite-derived Precipitation Estimates) (Lambert Conformal)
Nx | 1473
Ny | 1025
La1 | 12.190N
Lo1 | 226.514E = 133.459W
Res. & Comp. Flag | 0 0 0 0 1 0 0 0
Lov | 265.000E = 95.000W
Dx | 5.07940625 km
Dy | 5.07940625 km
Projection Flag (bit 1) | 0 (not bipolar)
Scanning Mode (bits 1 2 3) | 0 1 0
Latin1 | 25.000N
Latin2 | 25.000N (tangent cone)
Lat/lon values of the corners of the grid
(1,1) | 12.190N, 133.459W
(1,129) | 54.536N, 152.856W
(185,129) | 57.290N, 49.385W
(185,1) | 14.335N, 65.091W
Pole point
(I,J) | (209.000, 711.980)
| The Dx, Dy grid increment (at 25 deg north) was selected so that the grid spacing would be exactly 20.000 km at 35 deg north; the intersection of 35N & 95W falls on point (209,97).
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VALUE | GRID DESCRIPTIONS
--- | ---
228 ()[A] | Global (longitude/latitude grid)
Ni | 144
Nj | 73
La1 | 90.000N
Lo1 | 0.000E
Res. & Comp. Flag | 1 0 0 0 0 0 0 0
La2 | 90.000S
Lo2 | 357.500E = 2.500W
Di | 2.500 degrees
Dj | 2.500 degrees
Projection Flag (bit 1) | 0
Scanning Mode (bits 1 2 3) | 0 1 0 (NB: matrix style)
Lat/lon values of the corners of the grid
(1,1) | 90.000N, 0.000E
(1,73) | 90.000S, 0.000E
(144,73) | 90.000S, 359.000E
(144,1) | 90.000N, 359.000E
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VALUE | GRID DESCRIPTIONS
--- | ---
229 ()[F] | Global (longitude/latitude grid)
Ni | 360
Nj | 181
La1 | 90.000N
Lo1 | 0.000E
Res. & Comp. Flag | 1 0 0 0 0 0 0 0
La2 | 90.000S
Lo2 | 359.000E = 1.000W
Di | 1.000 degrees
Dj | 1.000 degrees
Projection Flag (bit 1) | 0
Scanning Mode (bits 1 2 3) | 0 1 0 (NB: matrix style)
Lat/lon values of the corners of the grid
(1,1) | 90.000N, 0.000E
(1,181) | 90.000S, 0.000E
(360,181) | 90.000S, 359.000E
(360,1) | 90.000N, 359.000E
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VALUE | GRID DESCRIPTIONS
--- | ---
230 ()[G] | Global (longitude/latitude grid)
Ni | 720
Nj | 361
La1 | 90.000N
Lo1 | 0.000E
Res. & Comp. Flag | 1 0 0 0 0 0 0 0
La2 | 90.000S
Lo2 | 359.500E = 0.500W
Di | 0.5000 degrees
Dj | 0.500 degrees
Projection Flag (bit 1) | 0
Scanning Mode (bits 1 2 3) | 0 1 0 (NB: matrix style)
Lat/lon values of the corners of the grid
(1,1) | 90.000N, 0.000E
(1,361) | 90.000S, 0.000E
(720,361) | 90.000S, 359.000E
(720,1) | 90.000N, 359.000E
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VALUE | GRID DESCRIPTIONS
--- | ---
231 ()[H] | Northern Hemisphere (longitude/latitude grid)
Ni | 720
Nj | 181
La1 | 0.000N
Lo1 | 0.000E
Res. & Comp. Flag | 1 0 0 0 0 0 0 0
La2 | 90.000N
Lo2 | 359.500E = 0.500W
Di | 0.5000 degrees
Dj | 0.500 degrees
Projection Flag (bit 1) | 0
Scanning Mode (bits 1 2 3) | 0 1 0 (NB: matrix style)
Lat/lon values of the corners of the grid
(1,1) | 0.000N, 0.000E
(1,181) | 90.000N, 0.000E
(720,181) | 90.000N, 359.000E
(720,1) | 0.000N, 359.000E
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VALUE | GRID DESCRIPTIONS
--- | ---
232 ()[I] | Northern Hemisphere (longitude/latitude grid)
Ni | 360
Nj | 91
La1 | 0.000N
Lo1 | 0.000E
Res. & Comp. Flag | 1 0 0 0 0 0 0 0
La2 | 90.000N
Lo2 | 359.000E = 1.000W
Di | 1.000 degrees
Dj | 1.000 degrees
Projection Flag (bit 1) | 0
Scanning Mode (bits 1 2 3) | 0 1 0 (NB: matrix style)
Lat/lon values of the corners of the grid
(1,1) | 0.000N, 0.000E
(1,91) | 90.000N, 0.000E
(360,91) | 90.000N, 359.000E
(360,1) | 0.000N, 359.000E
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VALUE | GRID DESCRIPTIONS
--- | ---
233 ()[J] | Regional (longitude/latitude grid)
Ni | 288
Nj | 157
La1 | 78.000N
Lo1 | 0.000E
Res. & Comp. Flag | 1 0 0 0 0 0 0 0
La2 | 78.000S
Lo2 | 358.750E = 1.250W
Di | 1.250 degrees
Dj | 1.000 degrees
Projection Flag (bit 1) | 0
Scanning Mode (bits 1 2 3) | 0 1 0 (NB: matrix style)
Lat/lon values of the corners of the grid
(1,1) | 90.000N, 0.000E
(1,73) | 90.000S, 0.000E
(144,73) | 90.000S, 359.000E
(144,1) | 90.000N, 359.000E
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VALUE | GRID DESCRIPTIONS
--- | ---
234 ()[K] | Regional (longitude/latitude grid)
Ni | 133
Nj | 121
La1 | 15.000N
Lo1 | 262.000E = 98.000W
Res. & Comp. Flag | 1 0 0 0 0 0 0 0
La2 | 45.000S
Lo2 | 295.000E = 65.000W
Di | 0.250 degrees
Dj | 0.250 degrees
Projection Flag (bit 1) | 0
Scanning Mode (bits 1 2 3) | 0 1 0 (NB: matrix style)
Lat/lon values of the corners of the grid
(1,1) | 15.000N, 262.000E
(1,73) | 15.000S, 295.000E
(144,73) | 45.000S, 295.000E
(144,1) | 90.000N, 262.000E
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VALUE | GRID DESCRIPTIONS
--- | ---
235 ()[L] | Global (longitude/latitude grid)
Ni | 720
Nj | 360
La1 | 89.750N
Lo1 | 0.250E
Res. & Comp. Flag | 0 1 0 0 1 0 0 0
La2 | 89.750S
Lo2 | 359.750E = 0.250W
Projection Flag (bit 1) | 0
Scanning Mode (bits 1 2 3) | 0 1 0 (NB: matrix style)
Lat/lon values of the corners of the grid
(1,1) | 89.750N, 0.250E
(1,360) | 89.750S, 0.250E
(720,360) | 89.750S, 359.750E
(720,1) | 89.750N, 359.750E
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VALUE | GRID DESCRIPTIONS
--- | ---
236 (W) | Regional - CONUS (Lambert Conformal)
Nx | 151
Ny | 113
La1 | 16.281N
Lo1 | 233.862E = 126.138W
Res. & Comp. Flag | 0 0 0 0 1 0 0 0
Lov | 265.000E = 95.000W
Dx | 40.63525 km
Dy | 40.63525 km
Projection Flag | 0
Scanning Mode (bits 1 2 3) | 0 1 0
Latin 1 | 25.000N
Latin 2 | 25.000N (tangent cone)
Lat/lon values of the corners of the grid
(1,1) | 16.281N, 126.138W
(1,113) | 54.173N, 139.856W
(151,113) | 55.481N, 57.381W
(151,1) | 17.340N, 69.038W
Pole point
(I,J) | (83.000, 351.730)
| The Dx, Dy grid increment (at 25 deg north) was selected so that the grid spacing would be exactly 40.000 km at 35 deg north; the intersection of 35N & 95W falls on point (83, 43).
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VALUE | GRID DESCRIPTIONS
--- | ---
237 (P) | Puerto Rico FAA Regional Grid (Lambert Conformal)
Nx | 54
Ny | 47
La1 | 16.201N
Lo1 | 285.720E = 74.280W
Res. & Comp. Flag | 0 0 0 0 1 0 0 0
Lov | 253.000E = 107.000W
Dx | 32.46341 km
Dy | 32.46341 km
Projection Flag | 0
Scanning Mode (bits 1 2 3) | 0 1 0
Latin 1 | 50.000N
Latin 2 | 50.000N (tangent cone)
Lat/lon values of the corners of the grid
(1,1) | 16.201N, 74.280W
(1,47) | 26.884N, 68.346W
(54,47) | 18.946N, 55.797W
(54,1) | 9.844N, 62.760W
Pole point
(I,J) | (-120.486, 260.767)
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VALUE | GRID DESCRIPTIONS
--- | ---
238 ()(M) | Western North Atlantic (longitude/latitude grid)
Ni | 275
Nj | 203
La1 | 50.250N
Lo1 | 261.750E
Res. & Comp. Flag | 0 1 0 0 1 0 0 0
La2 | 0.250S
Lo2 | 330.250E = 29.750W
Projection Flag (bit 1) | 0
Scanning Mode (bits 1 2 3) | 0 1 0 (NB: matrix style)
Lat/lon values of the corners of the grid
(1,1) | 50.750N, 261.750E
(1,203) | 0.250S, 261.750E
(275,203) | 0.250S, 330.250E
(275,1) | 50.750N, 330.250E
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VALUE | GRID DESCRIPTIONS
--- | ---
239 ()(N) | Alaska Regional (longitude/latitude grid)
Ni | 155
Nj | 123
La1 | 75.750N
Lo1 | 159.500E
Res. & Comp. Flag | 0 1 0 0 1 0 0 0
La2 | 44.750N
Lo2 | 236.500E = 123.500W
Projection Flag (bit 1) | 0
Scanning Mode (bits 1 2 3) | 0 1 0 (NB: matrix style)
Lat/lon values of the corners of the grid
(1,1) | 75.750N, 159.500E
(1,123) | 44.750N, 159.500E
(155,123) | 44.750N, 236.500E
(155,1) | 75.750N, 236.500E
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VALUE | GRID DESCRIPTIONS
--- | ---
240 () | HRAP Grid over the Contiguous United States and Puerto Rico (polar stereographic)
Nx | 1121
Ny | 881
La1 | 23.098N
Lo1 | 240.964E = 119.036W
Res. & Comp. Flag | 0 0 0 0 1 0 0 0
Lov | 255.000E = 105.000W
Dx | 4.7625 km
Dy | 4.7625 km
Projection Flag (bit 1) | 0
Scanning Mode (bits 1 2 3) | 0 1 0
Lat/lon values of the corners of the grid
(1,1) | 23.098N, 119.036W
(1,881) | 53.480N, 134.055W
(1121,881) | 45.620N, 60.000W
(1121,1) | 19.798N, 80.772W
Pole point
(I,J) | (401.000, 1601.000)
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VALUE | GRID DESCRIPTIONS
--- | ---
241 () | Regional - NOAMHI - High Resolution North American Grid (Lambert Conformal)
Nx | 549
Ny | 445
La1 | -4.850N = 4.850S
Lo1 | 208.900E = 151.100W
Res. & Comp. Flag | 0 0 0 0 1 0 0 0
Lov | 249.000E = 111.000W
Dx | 22.00000 km
Dy | 22.00000 km
Projection Flag (bit 1) | 0
Scanning Mode (bits 1 2 3) | 0 1 0
Latin 1 | 45.000N
Latin 2 | 45.000N
Lat/lon values of the corners of the grid
(1,1) | 4.850S, 151.100W
(1,445) | 47.094N, 139.472E
(549,445) | 46.455N, 1.266W
(549,1) | 5.072S, 70.490W
Pole point
(I,J) | (273.346, 505.638)
| The intersection of 45N & 111W is at (273.346, 216.039).
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VALUE | GRID DESCRIPTIONS
--- | ---
242 (S) | Grid over Alaska - Quadruple Resolution Grid (polar stereographic)
Nx | 553
Ny | 425
La1 | 30.000N
Lo1 | 187.000E = 173.000W
Res. & Comp. Flag | 0 0 0 0 1 0 0 0
Lov | 225.000E = 135.000W
Dx | 11.25 km
Dy | 11.25 km
Projection Flag (bit 1) | 0
Scanning Mode (bits 1 2 3) | 0 1 0
Lat/lon values of the corners of the grid
(1,1) | 30.000N, 173.000W
(1,425) | 50.454N, 143.597E
(553,425) | 70.111N, 62.850W
(553,1) | 38.290N, 114.856W
Pole point
(I,J) | (375.636, 481.792)
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VALUE | GRID DESCRIPTIONS
--- | ---
243 () | Eastern North Pacific (longitude/latitude grid)
Ni | 126
Nj | 101
La1 | 10.000N
Lo1 | 190.000E = 170.000W
Res. & Comp. Flag | 1 0 0 0 0 0 0 0
La2 | 50.000N
Lo2 | 240.000E = 120.000W
Projection Flag (bit 1) | 0
Scanning Mode (bits 1 2 3) | 0 1 0 (NB: matrix style)
Lat/lon values of the corners of the grid
(1,1) | 10.000N, 190.000E
(1,101) | 50.000N, 190.000E
(126,101) | 50.000N, 240.000E
(126,1) | 10.000N, 240.000E
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VALUE | GRID DESCRIPTIONS
--- | ---
244 ()(O) | North Atlantic Hurricane (longitude/latitude grid)
Ni | 275
Nj | 203
La1 | 50.250N
Lo1 | 261.750E
Res. & Comp. Flag | 0 1 0 0 1 0 0 0
La2 | 0.250S
Lo2 | 330.250E = 29.750W
Projection Flag (bit 1) | 0
Scanning Mode (bits 1 2 3) | 0 1 0 (NB: matrix style)
Lat/lon values of the corners of the grid
(1,1) | 50.250N, 261.750E
(1,203) | 0.250S, 261.750E
(275,203) | 0.250S, 330.250E
(275,1) | 50.250N, 330.250E
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VALUE | GRID DESCRIPTIONS
--- | ---
245 () | Regional - NOAMHI - High Resolution over Eastern US (Lambert Conformal for 8 km NMM)
Nx | 336
Ny | 372
La1 | 22.980N
Lo1 | 267.160E = 92.840W
Res. & Comp. Flag | 0 0 0 0 1 0 0 0
Lov | 280.000E = 80.000W
Dx | 8.00000 km
Dy | 8.00000 km
Projection Flag (bit 1) | 0
Scanning Mode (bits 1 2 3) | 0 1 0
Latin 1 | 35.000N
Latin 2 | 35.000N
Lat/lon values of the corners of the grid
(1,1) | 22.980N, 92.840W
(1,372) | 49.125N, 97.902W
(336,372) | 49.122N, 62.070W
(336,1) | 22.977N, 67.139W
Pole point
(I,J) | (168.191, 1295.480)
| The intersection of 35N & 80W is at (168.365, 158.501).
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VALUE | GRID DESCRIPTIONS
--- | ---
246 () | Regional - NOAMHI - High Resolution over Western US (Lambert Conformal for 8 km NMM)
Nx | 332
Ny | 371
La1 | 25.970N
Lo1 | 232.027E = 127.973W
Res. & Comp. Flag | 0 0 0 0 1 0 0 0
Lov | 245.000E = 115.000W
Dx | 8.00000 km
Dy | 8.00000 km
Projection Flag (bit 1) | 0
Scanning Mode (bits 1 2 3) | 0 1 0
Latin 1 | 40.000N
Latin 2 | 40.000N
Lat/lon values of the corners of the grid
(1,1) | 25.970N, 127.973W
(1,371) | 51.947N, 134.096W
(332,371) | 51.968N, 96.061W
(332,1) | 25.984N, 102.135W
Pole point
(I,J) | (167.203, 1134.746)
| The intersection of 40N & 115W is at (167.203, 185.784).
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VALUE | GRID DESCRIPTIONS
--- | ---
247 () | Regional - NOAMHI - High Resolution over Central US (Lambert Conformal for 8 km NMM)
Nx | 336
Ny | 372
La1 | 22.980N
Lo1 | 249.160E = 110.840W
Res. & Comp. Flag | 0 0 0 0 1 0 0 0
Lov | 262.000E = 98.000W
Dx | 8.00000 km
Dy | 8.00000 km
Projection Flag (bit 1) | 0
Scanning Mode (bits 1 2 3) | 0 1 0
Latin 1 | 35.000N
Latin 2 | 35.000N
Lat/lon values of the corners of the grid
(1,1) | 22.980N, 110.840W
(1,372) | 49.125N, 115.902W
(336,372) | 49.122N, 80.070W
(336,1) | 22.977N, 85.139W
Pole point
(I,J) | (168.364, 1295.444)
| The intersection of 35N & 98W is at (168.365, 158.501).
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VALUE | GRID DESCRIPTIONS
--- | ---
248 () | Puerto Rico (longitude/latitude grid)
Ni | 135
Nj | 101
La1 | 14.500N
Lo1 | 288.500E = 71.500W
Res. & Comp. Flag | 1 0 0 0 0 0 0 0
La2 | 22.000N
Lo2 | 298.65E = 61.45W
Projection Flag (bit 1) | 0
Scanning Mode (bits 1 2 3) | 0 1 0 (NB: matrix style)
Lat/lon values of the corners of the grid
(1,1) | 14.500N, 288.500E
(1,101) | 22.000N, 288.500E
(135,101) | 22.000N, 298.650E
(135,1) | 14.500N, 298.600E
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VALUE | GRID DESCRIPTIONS
--- | ---
249 () | Grid over Alaska for 10-km Alaska nest (Polar Stereographic)
Nx | 367
Ny | 343
La1 | 45.400N
Lo1 | 188.400E = 171.600W
Res. & Comp. Flag | 0 0 0 0 1 0 0 0
Lov | 210.000E = 150.000W
Dx | 9.86789 km
Dy | 9.86789 km
Projection Flag (bit 1) | 0
Scanning Mode (bits 1 2 3) | 0 1 0
Lat/lon values of the corners of the grid
(1,1) | 45.400N, 171.600W
(1,343) | 69.625N, 152.845E
(367,343) | 69.454N, 92.531W
(367,1) | 45.334N, 128.163W
Pole point
(I,J) | (182.889, 460.425)
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VALUE | GRID DESCRIPTIONS
--- | ---
250 (D) | Grid over Hawaii for 8 km NMM and TPC TCM product (longitude/latitude grid)
Ni | 135
Nj | 101
La1 | 16.500N
Lo1 | 198.000E = 162.000W
Res. & Comp. Flag | 1 0 0 0 0 0 0 0
La2 | 24.000N
Lo2 | 208.050E = 151.950W
Projection Flag (bit 1) | 0
Scanning Mode (bits 1 2 3) | 0 1 0 (NB: matrix style)
Lat/lon values of the corners of the grid
(1,1) | 16.500N, 198.000E
(1,101) | 24.000N, 198.000E
(135,101) | 24.000N, 208.050E
(135,1) | 16.500N, 208.050E
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VALUE | GRID DESCRIPTIONS
--- | ---
251 ()[P] | Coastal Ocean Forecast System Grid - North Atlantic Region (longitude/latitude grid)
Ni | 332
Nj | 210
La1 | 26.350N
Lo1 | 276.950E = 83.050W
Res. & Comp. Flag | 1 0 0 0 0 0 0 0
La2 | 47.250N
Lo2 | 310.050E = 49.950W
Projection Flag (bit 1) | 0
Scanning Mode (bits 1 2 3) | 0 1 0 (NB: matrix style)
Lat/lon values of the corners of the grid
(1,1) | 26.350N, 276.950E
(1,332) | 26.350N, 310.050E
(210,332) | 47.250N, 310.050E
(210,1) | 47.250N, 276.950E
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VALUE | GRID DESCRIPTIONS
--- | ---
252 () | Regional - CONUS (Lambert Conformal)
Nx | 301
Ny | 225
La1 | 16.281N
Lo1 | 233.862E = 126.138W
Res. & Comp. Flag | 0 0 0 0 1 0 0 0
Lov | 265.000E = 95.000W
Dx | 20.317625 km
Dy | 20.317625 km
Projection Flag | 0
Scanning Mode (bits 1 2 3) | 0 1 0
Latin 1 | 25.000N
Latin 2 | 25.000N (tangent cone)
Lat/lon values of the corners of the grid
(1,1) | 16.281N, 126.138W
(1,225) | 54.172N, 139.856W
(301,225) | 55.481N, 57.383W
(301,1) | 17.340N, 69.039W
Pole point
(I,J) | (166.210, 701.026)
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VALUE | GRID DESCRIPTIONS
--- | ---
253 ()[S] | Eastern North Pacific Regional (longitude/latitude grid) (Also used by the North Pacific hurricane wave model)
Ni | 373
Nj | 224
La1 | 60.50N
Lo1 | 189.750E
Res. & Comp. Flag | 0 1 0 0 1 0 0 0
La2 | 4.750N
Lo2 | 282.750E = 77.250W
Projection Flag (bit 1) | 0
Scanning Mode (bits 1 2 3) | 0 1 0 (NB: matrix style)
Lat/lon values of the corners of the grid
(1,1) | 60.500N, 189.750E
(1,183) | 4.750N, 189.750E
(373,183) | 4.750N, 282.750E
(373,1) | 60.500N, 282.750E
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VALUE | GRID DESCRIPTIONS
--- | ---
254 [Z] | 40 km Mercator grid for Pacific Region
Ni | 369
Nj | 300
La1 | 35.000S
Lo1 | 110.000E = 250.000W
Res. & Comp. Flag | 1 0 0 0 0 0 0 0
La2 | 60.789N
Lo2 | 109.129W = 250.871E
Latin | 20.000
Scanning Mode (bits 1 2 3) | 0 1 0
Di | 40.000 km
Dj | 40.000 km
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Office Note 388 - GRIB