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GFS and NAM MOS Compare

KCVG GFS MOS GUIDANCE 1/21/2026 1200 UTC
KCVG NAM MOS GUIDANCE 1/21/2026 1200 UTC


Date/Time
UTC
1/21
18:00
Wed
1/21
21:00
Wed
1/22
00:00
Thu
1/22
03:00
Thu
1/22
06:00
Thu
1/22
09:00
Thu
1/22
12:00
Thu
1/22
15:00
Thu
1/22
18:00
Thu
1/22
21:00
Thu
1/23
00:00
Fri
1/23
03:00
Fri
1/23
06:00
Fri
1/23
09:00
Fri
1/23
12:00
Fri
1/23
15:00
Fri
1/23
18:00
Fri
1/23
21:00
Fri
1/24
00:00
Sat
1/24
06:00
Sat
1/24
12:00
Sat
Date/Time
Local
1/21
13:00
Wed
1/21
16:00
Wed
1/21
19:00
Wed
1/21
22:00
Wed
1/22
01:00
Thu
1/22
04:00
Thu
1/22
07:00
Thu
1/22
10:00
Thu
1/22
13:00
Thu
1/22
16:00
Thu
1/22
19:00
Thu
1/22
22:00
Thu
1/23
01:00
Fri
1/23
04:00
Fri
1/23
07:00
Fri
1/23
10:00
Fri
1/23
13:00
Fri
1/23
16:00
Fri
1/23
19:00
Fri
1/24
01:00
Sat
1/24
07:00
Sat
GFS-N/X 25 34 15 16 5
NAM-N/X 26 38 14 21 -3
GFS-TMP36373636343126273032282826211615141312 9 7
NAM-TMP35383639353126283436292220181619191711 3 0
GFS-DPT313131312824181511 8 81211 8 3-1-4-5-4-6-5
NAM-DPT252828312722181411 9 8 6 7 7 7 9 5 1-31011
GFS-CLDOVOVOVOVSCSCFWCLFWSCSCBKOVBKBKOVOVBKBKOVOV
NAM-CLDOVOVOVOVOVOVSCCLFWSCFWFWBKBKBKBKBKSCFWSCOV
GFS-WDR212122242326292927262524263132323333350204
NAM-WDR222123232426282727262623263033323333350204
GFS-WSP171714131314110909090606071015151514131212
NAM-WSP141411111314100908080505050512141414161210
GFS-P06 28 18 4 0 1 0 4 4 3 2 2
NAM-P06 15 5 5 6 6 6 10 10 8 810
GFS-P12 18 2 4 5 9
NAM-P12 12 6 10 11 10
GFS-Q06 0 0 0 0 0 0 0 0 0 0 0
NAM-Q06 0 0 0 0 0 0 0 0 0 0 0
GFS-Q12 0 0 0 0 0
NAM-Q12 0 0 0 0 0
GFS-T06 0/20 0/19 0/13 0/ 9 0/ 0 0/10 0/10 0/10 0/ 6 0/ 5
NAM-T06 0/23 0/18 0/ 5 0/ 8 0/ 8 0/10 1/ 7 0/ 7 0/11 0/ 6
GFS-T12 0/29 0/13 1/19 0/10 0/14
NAM-T12 0/25 0/10 0/14 1/ 7 0/19
GFS-POZ 4 0 0 0 0 0 1 1 1 2 1 1 2 0 1 1 1 1 1 0 1
NAM-POZ 9 6 0 0 0 0 1 1 1 2 2 1 1 1 1 2 2 2 3 3 3
GFS-POS754735517193999999999999999999989899999896
NAM-POS916560808596999999989798989899989896979495
GFS-TYP S R R S S S S S S S S S S S S S S S S S S
NAM-TYP S S S S S S S S S S S S S S S S S S S S S
GFS-SNW 0 0 0
NAM-SNW 0 0 0
GFS-CIG 4 4 4 6 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 7
NAM-CIG 4 4 5 5 6 6 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8
GFS-VIS 7 5 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7
NAM-VIS 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7
GFS-OBV N N N N N N N N N N N N N N N N N N N N N
NAM-OBV N N N N N N N N N N N N N N N N N N N N N

Entries of "--" indicate that the current model run does not include forecast data for the time period.


Descriptions of MOS Elements

Definitions of Categorical Elements

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
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
Visibility (VIS) Categories
1 < 1/2 miles
2 1/2 - < 1 miles
3 1 - < 2 miles
4 2 - < 3 miles
5 3 - 5 miles
6 6 miles
7 > 6 miles
Ceiling Height (CIG) Categories
1 < 200 feet
2 200 - 400 feet
3 500 - 900 feet
4 1000 - 1900 feet
5 2000 - 3000 feet
6 3100 - 6500 feet
7 6600 - 12,000 feet
8 > 12,000 feet
Cloud (CLD) Categories
CL clear
FW > 0 to 2 octas of total sky cover
SC > 2 to 4 octas of total sky cover
BK > 4 to < 8 octas of total sky cover
OV 8 octas of total sky cover or totally obscured
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
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

MOS element descriptions and definitions are adapted from the NWS Meteorological Development Laboratory's web site.


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