DECODING RAFS/NGM MODEL FOUS DATA
                    ---------------------------------
   The NGM 60-90 Bulletins contain the initial numerical model analyses
and forecasts for points in the United States, Canada, and over the
adjacent waters.  The forecasts are provided in 6 hourly intervals from
6 to 48 hours after either 0000 or 1200 GMT (Z) observations.  The 
forecasts are for 6 hour accumulated precipitation, relative humidity,
vertical velocity, lifted index, sea level pressure, direction and
speed of the mean wind in the boundary layer, 1000 to 500 millibar
thickness, and 3 model-layer temperatures.

The general format:
------------------

FOXXII KWBC DDTTTT
TTPTT R1R2R3 VVVLI PSDDFF HHT1T3T5
----------------------------------
NNN// R1R2R3 VVVLI PSDDFF HHT1T3T5
06PTT R1R2R3 VVVLI PSDDFF HHT1T3T5
12PTT R1R2R3 VVVLI PSDDFF HHT1T3T5
18PTT R1R2R3 VVVLI PSDDFF HHT1T3T5
24PTT R1R2R3 VVVLI PSDDFF HHT1T3T5
30PTT R1R2R3 VVVLI PSDDFF HHT1T3T5
36PTT R1R2R3 VVVLI PSDDFF HHT1T3T5
42PTT R1R2R3 VVVLI PSDDFF HHT1T3T5
48PTT R1R2R3 VVVLI PSDDFF HHT1T3T5


CODE    EXPLANATION
=====   ==================
XX      Region identifier.
II      Station group number.
DD      Day of the month forecast was issued.
TTTT    Greenwich time of forecast cycle on which the data is based.
NNN     Forecast station three letter identifier.
PTT     6 hour accumulated precipitation in hundredths of inches.
R1      Mean relative humidity of the lowest model layer (lowest 35
        mb), in percent.
R2      Mean relative humidity of model layers 2 through 9 (up to 500
        mb), in percent.
R3      Mean relative humidity of model layers 10 through 13 (500 to
        200 mb), in percent.
VVV     Vertical velocity at 700 mb, in tenths of a microbar per
        second, weighted average of three hourly values at forecast
        time, one hour before, and one hour after (double weighted
        at forecast time).  Minus sign represents downward motion.
LI      Lifted index in degrees Celsius.  Negative values are designated
        by subtracting from 100; e.g. -4= 96.  Taken from the lowest
        (most unstable) of four possible values.  The values derived 
        from lifting parcels from the four lowest model layers up 
        to 500 mb.
PS      Sea level pressure calculated from lowest sigma level (based on
        the contour base map).
DD      Direction in tens of degrees of the mean wind in the lowest model
        layer (35 mb).
FF      Wind speed in knots of the lowest model layer (lowest 35 mb).
HH      1000-500 mb thickness in decameters with the first digit omitted.
T1      Temperature in model layer 1 (lowest 35 mb) in degrees Celsius.
T3      Temperature in model layer 3 (approximately 900 mb).
T5      Temperature in model layer 5 (approximately 800 mb).