GFS and NAM MOS Compare

KCVG GFS MOS GUIDANCE 8/21/2017 1200 UTC
KCVG NAM MOS GUIDANCE 8/21/2017 1200 UTC


Date/Time
UTC
8/21
18:00
Mon
8/21
21:00
Mon
8/22
00:00
Tue
8/22
03:00
Tue
8/22
06:00
Tue
8/22
09:00
Tue
8/22
12:00
Tue
8/22
15:00
Tue
8/22
18:00
Tue
8/22
21:00
Tue
8/23
00:00
Wed
8/23
03:00
Wed
8/23
06:00
Wed
8/23
09:00
Wed
8/23
12:00
Wed
8/23
15:00
Wed
8/23
18:00
Wed
8/23
21:00
Wed
8/24
00:00
Thu
8/24
06:00
Thu
8/24
12:00
Thu
Date/Time
Local
8/21
14:00
Mon
8/21
17:00
Mon
8/21
20:00
Mon
8/21
23:00
Mon
8/22
02:00
Tue
8/22
05:00
Tue
8/22
08:00
Tue
8/22
11:00
Tue
8/22
14:00
Tue
8/22
17:00
Tue
8/22
20:00
Tue
8/22
23:00
Tue
8/23
02:00
Wed
8/23
05:00
Wed
8/23
08:00
Wed
8/23
11:00
Wed
8/23
14:00
Wed
8/23
17:00
Wed
8/23
20:00
Wed
8/24
02:00
Thu
8/24
08:00
Thu
GFS-N/X 70 83 61 80 57
NAM-N/X 70 86 62 79 56
GFS-TMP868782767473727680797672686462717778746259
NAM-TMP909185777473737983827872686564707677726158
GFS-DPT696868686969697071717170666158575555565655
NAM-DPT646364646465677071717168656259545352535452
GFS-CLDBKBKOVBKOVOVOVOVOVOVOVOVCLCLCLCLFWFWSCFWFW
NAM-CLDBKSCBKSCSCSCBKOVOVOVOVOVOVFWFWFWFWFWFWSCFW
GFS-WDR222120192020202221232832353635353333343501
NAM-WDR212220202020212626262831350101013232343535
GFS-WSP070604050405060810121007070505080708060404
NAM-WSP080705040405071011120705070604070809080404
GFS-P06 10 0 25 34 59 22 6 3 4 2 3
NAM-P06 2 2 4 9 59 36 10 7 7 7 7
GFS-P12 25 75 24 5 7
NAM-P12 6 59 36 11 11
GFS-Q06 0 0 0 0 2 0 0 0 0 0 0
NAM-Q06 0 0 0 0 2 0 0 0 0 0 0
GFS-Q12 0 3 0 0 0
NAM-Q12 0 1 0 0 0
GFS-T06 23/18 5/ 8 11/ 2 12/ 8 47/17 16/ 5 0/ 1 0/ 0 0/ 1 0/ 0
NAM-T06 10/15 5/ 8 6/ 3 5/ 9 38/12 22/ 5 5/ 0 0/ 3 0/ 8 2/ 1
GFS-T12 26/18 20/ 8 48/17 0/ 3 0/ 1
NAM-T12 14/15 6/ 9 43/13 5/ 3 2/ 8
GFS-CIG 8 8 8 8 8 8 8 8 8 6 7 6 8 8 8 8 8 8 8 8 8
NAM-CIG 8 8 8 8 8 8 8 5 7 6 5 3 4 8 8 8 8 8 8 8 8
GFS-VIS 7 7 7 7 7 7 7 5 7 7 7 5 7 7 7 7 7 7 7 7 6
NAM-VIS 7 7 7 7 7 7 7 6 7 5 5 4 5 7 7 7 7 7 7 7 7
GFS-OBV N N N N N N NHZ N N NBR N N N N N N N N N
NAM-OBV N N N N N N NHZ NHZHZBRBR 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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