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Sample Message
KSLC GFS MOS GUIDANCE 2/25/2005 1200 UTC
DT /JAN 25/JAN 26 /JAN 27 /JAN 28
HR 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 06 12
N/X 18 39 26 38 24
TMP 37 39 39 35 28 24 21 22 28 36 36 35 33 30 30 30 33 35 33 32 27
DPT 21 16 14 19 18 16 14 15 19 25 32 32 29 26 26 22 31 26 27 29 25
CLD SC SC SC CL CL SC SC BK BK OV OV OV OV OV OV OV OV OV OV OV OV
WDR 27 28 27 24 21 18 16 14 14 17 13 18 19 17 14 13 16 19 22 30 28
WSP 16 13 10 04 02 02 04 03 04 06 04 04 06 08 07 05 11 12 06 01 04
P06 1 0 0 12 30 26 30 52 60 34 26
P12 1 33 53 79 43
T06 0/ 0 0/ 0 0/ 0 0/ 0 1/ 0 2/ 0 1/ 1 3/ 0 5/ 1 2/ 0
T12 0/ 0 0/ 0 2/ 0 4/ 1 16/ 1
POZ 1 0 0 0 0 0 0 0 1 0 0 0 0 10 27 11 8 0 0 0 1
POS 56 48 70 85 96100100100 67 26 22 27 30 29 30 53 51 54 50 37 45
TYP S R S S S S S S S R S R R R Z S S S S R R
Q06 0 0 0 0 1 1 1 2 2 1
Q12 0 1 2 3 2
SNW 1 2
CIG 7 7 7 7 7 7 7 7 7 7 7 7 7 6 5 5 3 3 4 4 4
VIS 7 7 7 7 7 7 7 7 7 7 7 7 7 6 6 4 3 4 6 7 7
OBV N N N N N N N N N N N N N BR BR FG FG FG BR N N
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HR = Forecast hour, i.e. how many hours from the model run time.
N/X = daytime minimum/nightime maximum surface temperatures.
TMP = surface temperature valid at that hour.
DPT = surface dewpoint valid at that hour.
CLD = forecast categories of total sky cover valid at that hour.
WDR = forecasts of the 10-meter wind direction at the hour, given
in tens of degrees.
WSP = forecasts of the 10-meter wind speed at the hour, given in knots.
P06 = probability of precipitation (PoP) during a 6-h period ending
at that time.
P12 = PoP during a 12-h period ending at that time.
T06 = probability of thunderstorms/conditional probability of
severe thunderstorms during the 6-hr period ending at the
indicated time.
T12 = probability of thunderstorms/conditional probability of severe
thunderstorms during the 12-hr period ending at the indicated time.
POZ = conditional probability of freezing pcp occurring at the hour.
POS = conditional probability of snow occurring at the hour.
TYP = conditional precipitation type at the hour.
Q06 = quantitative precipitation forecast (QPF) category for liquid
equivalent precipitation amount during a 6-h period ending at
that time.
Q12 = QPF category for liquid equivalent precipitation amount during
a 12-h period ending at the indicated time.
SNW = snow fall categorical forecasts during a 24-h period ending at
the indicated time.
CIG = ceiling height categorical forecasts at the hour.
VIS = visibility categorical forecasts at the hour.
OBV = obstruction to vision categorical forecasts at the hour.
Definitions of Categorical Elements
MAV Ceiling Height Categories
1 < 200 feet
2 200 - 400 feet
3 500 - 900 feet
4 1000 - 3000 feet
5 3100 - 6500 feet
6 6600 - 12,000 feet
7 > 12,000 feet or unlimited ceiling
MAV Visibility (VIS) Categories
1 <= 1/4 miles
2 > 1/4 - 1/2 miles
3 > 1/2 - < 1 miles
4 1 - < 3 miles
5 3 - 5 miles
6 6 miles
7 > 6 miles
MAV QPF Categories
0 no precipitation
1 0.01 to 0.09 inches
2 0.10 to 0.24 inches
3 0.25 to 0.49 inches
4 0.50 to 0.99 inches
5 1.00 to 1.99 inches
6 2.00 inches or greater
MAV Cloud (CLD) Categories
CL clear
SC scattered > 0 to 4 octas
BK broken > 4 to < 8 octas
OV overcast
MAV Obstruction to Vision (OBV) Categories
N none of the following
HZ haze, smoke, dust
BR mist (fog with visibility >= 5/8 mile)
FG fog or ground fog (visibility < 5/8 mile)
BL blowing dust, sand, snow
MAV Snow Fall Amount Categories
0 no snow or a trace expected
1 > a trace to < 2 inches
2 2 to < 4 inches
4 4 to < 6 inches
6 6 to < 8 inches
8 >= 8 inches
MAV Precipitation Type (TYP) Categories
S pure snow or snow grains
Z freezing rain/drizzle, ice pellets, or anything mixed with
freezing precip
R pure rain/drizzle or rain mixed with snow
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