Description of NGM MOS Data


Line 3: First three letters are the location identifier.

DAY:    Month and day of month for the times listed on the line below.

HOUR:   The UTC hour of the day.  Subtract 5 hours for EST, 4 for EDT.

MX/MN:  The forecast maximum or minimum temperatures for the preceeding 12 hour period.

TEMP:   The forecast temperature for the time listed on the "HOUR" line

DEWPT:  The dew point for the forecast hour

CLDS:   The sky cover for the forecast hour.  
           OV is Overcast  (10/10 sky cover)
           BK is Broken    (6/10 to 9/10 sky cover)
           SC is Scattered (1/10 to 5/10 sky cover)
           CL is Clear     (0/10 sky cover)

WDIR:   The wind direction for the forecast hour in tens of degrees.
           36 is wind from the north
           09 is wind from the east
           18 is wind from the south
           etc.

WSPD:   The wind speed for the forecast hour in knots.
        10 knots is about 11.5 miles an hour.

POP6:   The probability of precipitation (in precent) for the 6 hour period
	ending at the forecast hour.

POP12:  The probability of precipitation (in precent) for the 12 hour period
	ending at the forecast hour.

QPF:    Precipitation amount code forecast for the 6 hour period / 12 hour period.
        ending at the forecast hour
           0 =  no precipitation
           1 =  .01 to  .09 inches
           2 =  .10 to  .24 inches
           3 =  .25 to  .49 inches
           4 =  .50 to  .99 inches
           5 = 1.00 to 1.99 inches
           6 = 2.00 or more inches

TSV06:  The probability of a thunderstorm / severe thunderstorm for the 6 hour
        period ending at the forecast hour.

TSV12:  The probability of a thunderstorm / severe thunderstorm for the 12 hour
        period ending at the forecast hour.

PTYPE:  Precipitation type for the forecast hour.
           R is Rain
           S is Snow
           Z is Freezing rain or Ice Pellets (sleet)

POZP:   Probability that precipitation type will be freezing if any precipitation occurs.

POSN:   Probability that precipitation type will be snow if any precipitation occurs.

SNOW:   Snow amount code for the 6 hour period / 12 hour period.
        ending at the forecast hour
           0 = no snow
           1 = trace to 1.9 inches
           2 = 2.0 inches to 3.9 inches
           4 = 4.0 inches to 5.9 inches
           6 = 6.0 inches or more

CIG:    Ceiling height (height of clouds base) code for the forecast hour.
           1 = less than  200 feet
           2 =  200 to    400 feet
           3 =  500 to    900 feet
           4 = 1000 to   3000 feet
           5 = 3100 to   6500 feet
           6 = 6600 t0   12000 feet
           7 = more than 12000 feet

VIS:    Visibility code for the forecast hour.
           1 = less than 1/2 mile
           2 = 1/2 to    7/8 miles
           3 =   1 to  2 3/4 miles
           4 =   3 to      5 miles
           5 =   more than 5 miles
        
OBVIS:  Obstructions to vision for the forecast hour.
           N is None
           F is Fog
           H is Haze
           K is Smoke