LOOP
500
HGHT CI30 CLR1 F00 FIL2
TXT4 00-H FORECAST 500 MB HEIGHT FIELD (FROM T-12, WHITE)
TXTT HIT <RETURN> TO OVERLAY 12-H FORECAST 500 MB HEIGHT FIELD (FROM T+00)
ENDL
LOOP
HGHT CI30 CLR2 F12 FIL1&
TXT4 00-H FORECAST 500 MB HEIGHT FIELD (FROM T-12, WHITE)
TXT5 12-H FORECAST 500 MB HEIGHT FIELD (FROM T+00, RED)
TXTT HIT <RETURN> TO DISPLAY THE 24H HEIGHT CHANGE -
ENDL
LOOP
TXTT                                                                      -
SDIF HGHT F12 FIL1 HGHT F00 FIL2 CI10 CLR1
SDIF HGHT F12 FIL1 HGHT F00 FIL2 CI10 LSTN -005 CLR2 DASH/
SDIF HGHT F12 FIL1 HGHT F00 FIL2 CI10 GRTN  005 CLR7 DASH/ 
TXT4 24 HOUR 500 MB HEIGHT CHANGE FROM T-12 (00H FX) TO T+00 (12H FX)     -
TXT5 NEGATIVE VALUES (RED) > 500 MB HEIGHT FALLS OVER THE 24 H PERIOD -
TXT6 POSITIVE VALUES (BLUE)> 500 MB HEIGHT RISES OVER THE 24 H PERIOD -
ENDL
