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GFS and NAM MOS Compare

KCVG GFS MOS GUIDANCE 7/23/2021 1800 UTC
KCVG NAM MOS GUIDANCE 7/23/2021 1200 UTC


Date/Time
UTC
7/23
18:00
Fri
7/23
21:00
Fri
7/24
00:00
Sat
7/24
03:00
Sat
7/24
06:00
Sat
7/24
09:00
Sat
7/24
12:00
Sat
7/24
15:00
Sat
7/24
18:00
Sat
7/24
21:00
Sat
7/25
00:00
Sun
7/25
03:00
Sun
7/25
06:00
Sun
7/25
09:00
Sun
7/25
12:00
Sun
7/25
15:00
Sun
7/25
18:00
Sun
7/25
21:00
Sun
7/26
00:00
Mon
7/26
03:00
Mon
7/26
06:00
Mon
7/26
12:00
Mon
7/26
18:00
Mon
Date/Time
Local
7/23
14:00
Fri
7/23
17:00
Fri
7/23
20:00
Fri
7/23
23:00
Fri
7/24
02:00
Sat
7/24
05:00
Sat
7/24
08:00
Sat
7/24
11:00
Sat
7/24
14:00
Sat
7/24
17:00
Sat
7/24
20:00
Sat
7/24
23:00
Sat
7/25
02:00
Sun
7/25
05:00
Sun
7/25
08:00
Sun
7/25
11:00
Sun
7/25
14:00
Sun
7/25
17:00
Sun
7/25
20:00
Sun
7/25
23:00
Sun
7/26
02:00
Mon
7/26
08:00
Mon
7/26
14:00
Mon
GFS-N/X---- 64 86 69 85 67
NAM-N/X 66 88 73 88-- 70--
GFS-TMP----807168666777828482757271737982827974727087
NAM-TMP81848074716870808585817775747681858580--7372--
GFS-DPT----626363636464646567686869707372727271696867
NAM-DPT61616264646465656565666868697173737373--7271--
GFS-CLD----FWCLCLCLFWCLSCBKSCSCBKOVOVBKBKBKBKSCFWBKSC
NAM-CLDSCSCSCSCCLCLFWFWSCSCSCFWSCBKBKBKBKBKBK--OVBK--
GFS-WDR----141316161820212221212222222525263019080204
NAM-WDR13121314161719222323212021212323242426--2033--
GFS-WSP----030202020204060604050405040607060402010205
NAM-WSP04040302010102050607040304030507070704--0303--
GFS-P06---- 1 0 0 8 6 38 46 45 1918 6
NAM-P06 2 0 2 1 1 3 23 23 39--3831--
GFS-P12---- 1 8 44 60 32
NAM-P12 2 2 29 52-- 53--
GFS-Q06---- 0 0 0 0 0 1 1 1 0 0 0
NAM-Q06 0 0 0 0 0 0 0 0 1-- 0 0--
GFS-Q12---- 0 0 1 3 0
NAM-Q12 0 0 0 1-- 2--
GFS-T06---- 2/ 0 1/ 0 4/ 3 12/ 9 6/ 5 18/ 2 29/ 5 47/19 17/ 4 5/ 2
NAM-T06 4/ 5 2/ 0 1/ 0 4/ 3 7/ 9 2/ 7 15/ 3 17/ 7 36/22-- 22/ 4--
GFS-T12---- 4/ 3 12/ 9 43/ 7 52/19 11/ 3
NAM-T12 4/ 7 4/ 3 7/10 25/ 7 --59/26 --
GFS-CIG---- 8 8 8 8 8 8 8 8 8 8 8 8 7 7 6 8 8 8 8 8 8
NAM-CIG 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 6 7 8-- 8 8--
GFS-VIS---- 7 7 7 6 6 7 7 7 7 7 7 7 7 7 7 7 7 7 5 4 7
NAM-VIS 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7-- 4 4--
GFS-OBV---- N N NHZHZ N N N N N N N N N N N N NBRBR N
NAM-OBV N N N N N N N N N N N N N N N N N N N--BRBR--

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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