Interpretation of TDL's NGM-Based
Alphanumeric Forecast Message
FOUS14 KWBC 060357
DCA ESC NGM MOS GUIDANCE 3/06/91 0000 UTC
DAY /MAR 6 /MAR 7 /MAR 8
HOUR 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12
MX/MN 59 39 54 24
TEMP 37 34 33 38 45 53 52 49 46 43 40 42 47 51 42 39 35 30 24
DEWPT 27 28 28 30 32 36 40 38 41 41 37 33 28 27 25 21 20 19 19
CLDS OV OV OV OV OV OV OV OV OV OV BK BK BK SC SC SC CL CL CL
WDIR 26 18 08 12 14 14 15 18 24 27 28 29 29 29 29 33 01 02 00
WSPD 01 04 06 10 11 12 16 18 13 15 12 20 24 22 14 12 14 08 00
POP06 4 9 46 85 62 3 7 12 8
POP12 49 91 8 19
QPF 0/ 0/ 1/1 3/ 2/4 0/ 0/0 0/ 0/0
TSV06 2/ 0 3/ 0 4/ 1 5/ 1 6/ 2 16/ 3 11/ 1 8/ 0 0/ 0
TSV12 4/ 0 8/ 1 21/ 4 9/ 1
PTYPE S S S S S R R R R R R R R S Z
POZP 8 10 12 6 0 0 0 0 0 1 3 0 2 24 35
POSN 65 67 70 48 41 14 11 13 15 16 20 9 16 50 42
SNOW 0/ 0/ 0/1 0/ 0/0 0/ 0/0 0/ 0/0
CIG 4 5 4 4 5 6 7 6 3 2 1 5 6
VIS 3 4 3 5 5 5 5 4 2 2 1 3 4
OBVIS H H H N N N N F F F F H N
Bulletin Header
Message Identification [Station, Routing, Model, Initial Date and Time (UTC)]
Valid Month and Day (UTC)
Valid Hour (UTC)
Maximum or minimum temperature for daytime/nighttime period (oF)
Temperature at specified time (oF)
Dew point temperature at specified time (oF)
Cloud cover forecast for specified time (see below)
Wind direction ( x 10 = compass direction) for specified time
Wind speed (kts) for specified time
Probability of precipitation for 6-h period ending at specified time
Probability of precipitation for 12-h period ending at specified time
Precipitation amount forecast for 6- and 12-h periods (see below)
Thunderstorm/severe probabilities for 6-h periods ending at specified time
Thunderstorm/severe probabilities for 12-h periods ending at specified time
Precipitation type forecast for specified time (see below)
If precipitating, conditional probability of freezing precip. or ice pellets
If precipitating, conditional probability of snow for specified time
Snow amount for 6- and 12-h periods (see below)
Ceiling height forecast for specified time (see below)
Visibility forecast for specified time (see below)
Obstructions to vision forecast for specified time (see below)
CLDS QPF format "A/B" SNOW format "A/B"
CL - Clear A - Value for 6-h period A - Value for 6-h period
SC - Scattered 0 = no precipitation 0 = no snow
BK - Broken 1 = 0.01 - 0.09 inches 1 = trace - < 2 inches
OV - Overcast 2 = 0.10 - 0.24 inches 2 = > 2 inches
3 = 0.25 - 0.49 inches B - Value for 12-h period
PTYPE 4 = 0.50 - 0.99 inches 0 = no snow
R - Liquid 5 = > 1.00 inches 1 = trace - < 2 inches
Z - Freezing or B - Value for 12-h period 2 = 2 - < 4 inches
Ice pellets 0 = no precipitation 4 = 4 - < 6 inches
S - Snow 1 = 0.01 - 0.09 inches 6 = > 6 inches
2 = 0.10 - 0.24 inches
3 = 0.25 - 0.49 inches
4 = 0.50 - 0.99 inches
5 = 1.00 - 1.99 inches
6 = > 2.00 inches
CIG VIS OBVIS
1 = < 200 ft. 1 = < 1/2 miles H = Haze
2 = 200 - 400 ft. 2 = 1/2 - 7/8 miles F = Fog
3 = 500 - 900 ft. 3 = 1 - 2 3/4 miles N = No haze
4 = 1000 - 3000 ft. 4 = 3 - 5 miles or fog
5 = 3100 - 6500 ft. 5 = > 5 miles
6 = 6600 - 12000 ft.
7 = > 12000 ft.
however, look similar to the NGM MOS guidance package.
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