GFS and NAM MOS Compare

KCVG GFS MOS GUIDANCE 1/17/2019 1800 UTC
KCVG NAM MOS GUIDANCE 1/18/2019 0000 UTC


Date/Time
UTC
1/18
00:00
Fri
1/18
03:00
Fri
1/18
06:00
Fri
1/18
09:00
Fri
1/18
12:00
Fri
1/18
15:00
Fri
1/18
18:00
Fri
1/18
21:00
Fri
1/19
00:00
Sat
1/19
03:00
Sat
1/19
06:00
Sat
1/19
09:00
Sat
1/19
12:00
Sat
1/19
15:00
Sat
1/19
18:00
Sat
1/19
21:00
Sat
1/20
00:00
Sun
1/20
03:00
Sun
1/20
06:00
Sun
1/20
09:00
Sun
1/20
12:00
Sun
1/20
18:00
Sun
1/21
00:00
Mon
Date/Time
Local
1/17
19:00
Thu
1/17
22:00
Thu
1/18
01:00
Fri
1/18
04:00
Fri
1/18
07:00
Fri
1/18
10:00
Fri
1/18
13:00
Fri
1/18
16:00
Fri
1/18
19:00
Fri
1/18
22:00
Fri
1/19
01:00
Sat
1/19
04:00
Sat
1/19
07:00
Sat
1/19
10:00
Sat
1/19
13:00
Sat
1/19
16:00
Sat
1/19
19:00
Sat
1/19
22:00
Sat
1/20
01:00
Sun
1/20
04:00
Sun
1/20
07:00
Sun
1/20
13:00
Sun
1/20
19:00
Sun
GFS-N/X 30 41 31 39 --13 --
NAM-X/N---- 39 33 37 16 24
GFS-TMP37373533313437373533333334373532302622--1716--
NAM-TMP----373635343637363737363633333228262420172118
GFS-DPT36353230282830302927272829313027241915-- 9 6--
NAM-DPT----34333231323231303031313233312518161310 7 5
GFS-CLDOVOVOVOVOVOVOVOVOVOVOVOVOVOVOVOVOVOVOV--OVSC--
NAM-CLD----OVOVOVOVOVOVOVOVOVOVOVOVOVOVOVOVOVOVBKBKBK
GFS-WDR19262930303030100908080707060236363535--3435--
NAM-WDR----282928281909091010080808030136353535353335
GFS-WSP05060706040402030508111317131419272422--1413--
NAM-WSP----060705050202050810121213121926232117130908
GFS-P06 22 1 0 0 2 72 00 87 40--13 0--
NAM-P06---- 1 1 1 7 75 96 78 46 4 3 0
GFS-P12 41 3 82 00 --40 --
NAM-P12---- 2 78 00 52 3
GFS-Q06 0 0 0 0 0 2 4 2 1-- 0 0--
NAM-Q06---- 0 0 0 0 1 3 2 1 0 0 0
GFS-Q12 0 0 2 4 -- 0 --
NAM-Q12---- 0 2 3 1 0
GFS-T06 0/ 0 0/ 0 0/ 0 0/ 0 0/ 3 0/ 4 0/ 2 2/ 8 1/ 0-- 0/ 6--
NAM-T06---- 0/ 0 0/ 4 0/10 0/ 5 0/ 1 3/ 1 1/ 6 1/ 3 0/ 1 0/ 9
GFS-T12 1/ 3 0/11 1/ 4 2/10-- 1/ 6--
NAM-T12---- 0/ 4 0/10 4/ 1 1/10 0/ 1
GFS-POZ 0 0 1 7121011101218171510131513 9 0 1-- 2 1--
NAM-POZ---- 0 1 8 4 0 0 6152019191818211211 2 2 2 2 4
GFS-POS11243553576464584839281419112354679896--9899--
NAM-POS----314467736255707248412110224570829697989894
GFS-TYP R R R S S S S S S S R R R R R S S S S-- S S--
NAM-TYP---- R R S S S S S S S S R R R S S S S S S S S
GFS-SNW 0 -- 2 --
NAM-SNW---- 0 2
GFS-CIG 2 1 2 2 2 4 4 5 5 5 4 3 3 2 2 2 3 4 4-- 4 8--
NAM-CIG---- 2 2 2 1 4 4 4 5 4 4 3 2 2 3 2 4 5 5 8 8 8
GFS-VIS 3 2 1 2 5 5 6 7 7 7 5 3 3 2 2 3 5 7 7-- 7 7--
NAM-VIS---- 1 1 2 1 5 6 6 6 6 4 4 2 3 3 4 6 7 7 7 7 7
GFS-OBVBRFGFGFGBRBRHZ N N N NBRBRFGFGBR N N N-- N N--
NAM-OBV----BLFGFGFGHZHZHZBRBRBRBRBRBRBR 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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