GFS and NAM MOS Compare

KCVG GFS MOS GUIDANCE 7/19/2025 1800 UTC
KCVG NAM MOS GUIDANCE 7/19/2025 1200 UTC


Date/Time
UTC
7/19
18:00
Sat
7/19
21:00
Sat
7/20
00:00
Sun
7/20
03:00
Sun
7/20
06:00
Sun
7/20
09:00
Sun
7/20
12:00
Sun
7/20
15:00
Sun
7/20
18:00
Sun
7/20
21:00
Sun
7/21
00:00
Mon
7/21
03:00
Mon
7/21
06:00
Mon
7/21
09:00
Mon
7/21
12:00
Mon
7/21
15:00
Mon
7/21
18:00
Mon
7/21
21:00
Mon
7/22
00:00
Tue
7/22
03:00
Tue
7/22
06:00
Tue
7/22
12:00
Tue
7/22
18:00
Tue
Date/Time
Local
7/19
14:00
Sat
7/19
17:00
Sat
7/19
20:00
Sat
7/19
23:00
Sat
7/20
02:00
Sun
7/20
05:00
Sun
7/20
08:00
Sun
7/20
11:00
Sun
7/20
14:00
Sun
7/20
17:00
Sun
7/20
20:00
Sun
7/20
23:00
Sun
7/21
02:00
Mon
7/21
05:00
Mon
7/21
08:00
Mon
7/21
11:00
Mon
7/21
14:00
Mon
7/21
17:00
Mon
7/21
20:00
Mon
7/21
23:00
Mon
7/22
02:00
Tue
7/22
08:00
Tue
7/22
14:00
Tue
GFS-N/X---- 73 89 71 84 68
NAM-N/X 73 87 73 84-- 68--
GFS-TMP----777575747684868379767573737780817774727085
NAM-TMP81807775747475798283817775747475798177--7170--
GFS-DPT----747374737475737372716969697071706968676664
NAM-DPT72727170707171757677777575747370717069--6866--
GFS-CLD----OVBKBKOVBKBKOVOVOVOVOVOVOVOVOVOVOVOVOVBKSC
NAM-CLDOVOVOVOVOVOVOVOVOVOVOVOVOVOVOVOVOVBKOV--BKSC--
GFS-WDR----242424242426272833020506080908060305050605
NAM-WDR21242221232323252630303227021011260606--0808--
GFS-WSP----060705040407080706040405060708080706060406
NAM-WSP06090606070605060406050402040504050606--0404--
GFS-P06---- 23 25 38 66 48 57 42 48 4120 5
NAM-P06 83 14 15 20 25 50 75 65 32--19 7--
GFS-P12---- 35 80 74 62 46
NAM-P12 28 30 83 66-- 21--
GFS-Q06---- 0 0 1 3 1 2 1 1 1 0 0
NAM-Q06 3 0 0 0 0 1 5 4 0-- 0 0--
GFS-Q12---- 0 3 3 2 1
NAM-Q12 0 0 5 4-- 0--
GFS-T06---- 14/ 8 13/ 3 27/ 7 49/23 29/ 9 27/ 3 19/ 5 42/17 23/ 6 5/ 4
NAM-T06 50/22 5/ 9 12/ 6 12/ 8 29/31 34/17 32/ 5 28/ 6 34/18-- 5/ 2--
GFS-T12---- 34/ 9 62/23 35/ 6 42/17 8/ 5
NAM-T12 51/22 20/ 8 58/31 41/ 6 --43/18 --
GFS-CIG---- 7 7 7 6 6 7 7 7 7 7 6 3 3 4 5 6 7 7 7 8 8
NAM-CIG 5 5 5 7 6 5 4 4 4 5 7 7 6 3 3 3 4 5 7-- 8 8--
GFS-VIS---- 7 7 7 7 5 7 7 7 7 6 3 4 4 7 7 7 7 7 7 5 7
NAM-VIS 7 7 7 6 7 7 6 6 7 7 7 7 5 4 4 3 5 7 7-- 7 5--
GFS-OBV---- N N N NBR N N N NBRBRBRBR N N N N N NBR N
NAM-OBV N N NBR N NBRHZ N N NHZBRBRBRBRHZ N N-- NBR--

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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