The other variables are defined below. POP12 Probability of receiving at least 0.01 in of precipitation. PSL surface pressure PREC six hour predicted precipitation THK ignore LI lifted index. Large negative numbers indicate strong thunderstorms. VERT vertical wind speed.
Negative values indicate clear skies, positive values clouds.
This forecast is not as accurate as the NGM MOS for the first 48 hr. The first is a prediction of the average value for the 00 to 12 UTC period and the second column is a prediction for the 12 to 24 UTC period. A predicted average wind speed of 12 knots for a 12 hr period means very good winds.