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Sample Message
KDCA GFSX MOS GUIDANCE 2/19/2005 0000 UTC
FHR 24| 36 48| 60 72| 84 96|108 120|132 144|156 168|180 192
THU 19| FRI 20| SAT 21| SUN 22| MON 23| TUE 24| WED 25| THU 26 CLIMO
X/N 81| 66 82| 68 84| 68 80| 63 76| 59 75| 59 75| 59 75 60 77
TMP 74| 67 75| 69 75| 69 72| 64 68| 61 68| 61 68| 61 68
DPT 64| 64 67| 67 70| 67 66| 59 57| 54 56| 55 54| 55 56
CLD PC| CL PC| PC OV| OV OV| OV OV| CL OV| CL CL| CL PC
WND 10| 10 11| 10 13| 9 12| 12 14| 9 13| 11 13| 10 12
P12 7| 3 7| 11 27| 42 48| 44 24| 26 18| 22 14| 26 23 17 17
P24 | 7| 28| 55| 44| 37| 25| 34 24
Q12 0| 0 0| 0 0| 3 5| 4 0| 3 0| 0 |
Q24 | 0| 0| 4| 3| 4| |
T12 0| 0 0| 5 12| 18 20| 20 4| 5 5| 5 6| 8 6
T24 | 0 | 5 | 24 | 30 | 10 | 9 | 12
PZP 0| 0 0| 0 0| 0 2| 0 0| 0 2| 0 1| 1 2
PSN 0| 0 0| 0 0| 0 1| 0 0| 0 1| 0 1| 0 0
PRS 0| 0 0| 0 0| 0 0| 0 0| 0 2| 1 0| 1 1
TYP R| R R| R R| R R| R R| R R| R R| R R
SNW | 0| 0| 0| 0| | |
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FHR = Forecast hour, i.e. how many hours from the model run time
X/N = daytime max/nightime min temperatures
TMP = temperature valid at that hour
DPT = dewpoint valid at that hour
CLD = mean total sky cover over the 12-hr period ending at that time
WND = maximum sustained surface wind (WND) during a 12-h period
P12 = 12-hr probability of precipitation (PoP) ending at that time
P24 = 24-hr PoP ending at that time
Q12 = 12-hr quantitative precipitation forecast (QPF) ending at that time
Q24 = 24-hr QPF ending at that time
T12 = 12-hr probability of thunderstorm ending at that time
T24 = 24-hr probability of thunderstorm for the 1200-1200 UTC time period
ending at that time
PZP = conditional probability of freezing pcp occurring for the 12-hr
period ending at that time
PSN = conditional probability of snow occurring for the 12-hr period ending
at that time
PRS = conditional probability of rain/snow mix occurring for the 12-hr
period ending at that time
TYP = conditional precipitation type for the 12-hr period ending at
that time
SNW = snow fall categorical forecasts during a 24-h period ending at
the indicated time.
CLIMO = climatological normals
Definitions of Categorical Elements
MEX 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
MEX 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
MEX Cloud (CLD) Categories
CL mostly clear
PC partly cloudy
OV mostly cloudy
MEX Precipitation Type (TYP) Categories
S pure snow or snow grains
Z freezing rain/drizzle, ice pellets, or anything mixed with
freezing precip
RS rain/drizzle and snow mixed
R pure rain/drizzle
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