GFS and NAM MOS Compare

KCVG GFS MOS GUIDANCE 12/15/2017 1800 UTC
KCVG NAM MOS GUIDANCE 12/15/2017 1200 UTC


Date/Time
UTC
12/15
18:00
Fri
12/15
21:00
Fri
12/16
00:00
Sat
12/16
03:00
Sat
12/16
06:00
Sat
12/16
09:00
Sat
12/16
12:00
Sat
12/16
15:00
Sat
12/16
18:00
Sat
12/16
21:00
Sat
12/17
00:00
Sun
12/17
03:00
Sun
12/17
06:00
Sun
12/17
09:00
Sun
12/17
12:00
Sun
12/17
15:00
Sun
12/17
18:00
Sun
12/17
21:00
Sun
12/18
00:00
Mon
12/18
03:00
Mon
12/18
06:00
Mon
12/18
12:00
Mon
12/18
18:00
Mon
Date/Time
Local
12/15
13:00
Fri
12/15
16:00
Fri
12/15
19:00
Fri
12/15
22:00
Fri
12/16
01:00
Sat
12/16
04:00
Sat
12/16
07:00
Sat
12/16
10:00
Sat
12/16
13:00
Sat
12/16
16:00
Sat
12/16
19:00
Sat
12/16
22:00
Sat
12/17
01:00
Sun
12/17
04:00
Sun
12/17
07:00
Sun
12/17
10:00
Sun
12/17
13:00
Sun
12/17
16:00
Sun
12/17
19:00
Sun
12/17
22:00
Sun
12/18
01:00
Mon
12/18
07:00
Mon
12/18
13:00
Mon
GFS-N/X---- 29 49 34 45 37
NAM-N/X 28 49 35 47-- 39--
GFS-TMP----313132323337454844424038374042434038384051
NAM-TMP33343231303132364449444341393839434441--4242--
GFS-DPT----222223242527282828292828283134343433323540
NAM-DPT17181921212224262728292727272732353636--3638--
GFS-CLD----OVOVBKSCOVFWFWFWSCCLFWSCOVOVOVOVOVOVOVSCOV
NAM-CLDOVOVOVOVOVOVBKSCFWCLSCSCSCCLOVOVOVOVOV--OVOV--
GFS-WDR----252222212021222120212019182121181719212021
NAM-WDR26262623222120202121202120191920182218--2019--
GFS-WSP----070708080912131007070605060806060605050507
NAM-WSP12120807070706091210070706060507080605--0709--
GFS-P06---- 0 0 1 0 2 2 22 42 13 7 6
NAM-P06 2 1 2 4 3 4 6 18 29--2712--
GFS-P12---- 0 1 2 42 18
NAM-P12 3 4 6 29-- 49--
GFS-Q06---- 0 0 0 0 0 0 0 1 0 0 0
NAM-Q06 0 0 0 0 0 0 0 0 0-- 0 0--
GFS-Q12---- 0 0 0 1 0
NAM-Q12 0 0 0 0-- 1--
GFS-T06---- 0/ 4 0/ 4 0/ 0 0/ 0 0/ 0 0/ 0 0/ 5 0/ 0 0/ 0 0/ 0
NAM-T06 0/ 5 0/ 7 0/ 3 0/ 2 0/ 0 0/ 2 0/ 1 0/ 0 0/ 0-- 0/ 1--
GFS-T12---- 0/ 7 1/ 4 0/ 6 1/ 5 0/ 0
NAM-T12 0/ 7 0/ 3 0/ 2 1/ 1 -- 0/10 --
GFS-POZ---- 4 3 4 615 9 4 1 5 5 3 0 3 2 2 2 3 4 2 1 2
NAM-POZ 2 1 2 2 1 013 8 3 4 610 7 4 2 3 4 1 5-- 2 1--
GFS-POS----92989692604017 1 8 6114312 0 0 0171113 1 3
NAM-POS999998989899624511 8122618 8 7 2 0 1 0-- 1 3--
GFS-TYP---- S S S S S S R R R R R R R R R R R R R R R
NAM-TYP S S S S S S S S R R R R R R R R R R R-- R R--
GFS-SNW---- 0 0
NAM-SNW 0 0 -- 0--
GFS-CIG---- 6 7 7 8 8 8 8 8 8 8 8 8 8 8 6 5 6 6 2 4 4
NAM-CIG 6 6 6 6 7 7 7 8 8 8 8 8 8 8 8 8 6 4 3-- 3 4--
GFS-VIS---- 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 6 5 7
NAM-VIS 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 5 5-- 5 7--
GFS-OBV---- N N N N N N N N N N N N N N N N N N NBR N
NAM-OBV N N N N N N N N N N N N N N N N NBRBR--BR 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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