GFS and NAM MOS Compare

KCVG GFS MOS GUIDANCE 8/18/2017 1200 UTC
KCVG NAM MOS GUIDANCE 8/18/2017 1200 UTC


Date/Time
UTC
8/18
18:00
Fri
8/18
21:00
Fri
8/19
00:00
Sat
8/19
03:00
Sat
8/19
06:00
Sat
8/19
09:00
Sat
8/19
12:00
Sat
8/19
15:00
Sat
8/19
18:00
Sat
8/19
21:00
Sat
8/20
00:00
Sun
8/20
03:00
Sun
8/20
06:00
Sun
8/20
09:00
Sun
8/20
12:00
Sun
8/20
15:00
Sun
8/20
18:00
Sun
8/20
21:00
Sun
8/21
00:00
Mon
8/21
06:00
Mon
8/21
12:00
Mon
Date/Time
Local
8/18
14:00
Fri
8/18
17:00
Fri
8/18
20:00
Fri
8/18
23:00
Fri
8/19
02:00
Sat
8/19
05:00
Sat
8/19
08:00
Sat
8/19
11:00
Sat
8/19
14:00
Sat
8/19
17:00
Sat
8/19
20:00
Sat
8/19
23:00
Sat
8/20
02:00
Sun
8/20
05:00
Sun
8/20
08:00
Sun
8/20
11:00
Sun
8/20
14:00
Sun
8/20
17:00
Sun
8/20
20:00
Sun
8/21
02:00
Mon
8/21
08:00
Mon
GFS-N/X 65 85 64 87 67
NAM-N/X 65 85 64 88 65
GFS-TMP818279726967687581837872686667788485807271
NAM-TMP818379747168687681827872696767808586817169
GFS-DPT656566676766666767666565656565666665666767
NAM-DPT646363636262636565656665656465676564646465
GFS-CLDSCSCCLCLCLSCOVOVSCSCFWCLCLCLCLSCSCSCSCSCSC
NAM-CLDBKSCSCSCSCSCBKOVBKBKFWCLCLCLFWSCFWFWCLCLFW
GFS-WDR272727242319192227303130301012141820161816
NAM-WDR272727232120232527282934091312132120121517
GFS-WSP111106050303051011090602010101050506040303
NAM-WSP111105020303050607070501010101050404040203
GFS-P06 0 0 13 29 10 0 3 0 6 5 2
NAM-P06 2 2 5 5 3 5 5 4 6 3 4
GFS-P12 16 35 4 7 6
NAM-P12 6 12 8 8 8
GFS-Q06 0 0 0 0 0 0 0 0 0 0 0
NAM-Q06 0 0 0 0 0 0 0 0 0 0 0
GFS-Q12 0 0 0 0 0
NAM-Q12 0 0 0 0 0
GFS-T06 0/ 5 1/ 0 11/ 1 24/ 6 14/13 1/ 0 0/ 0 1/ 2 6/ 7 2/ 1
NAM-T06 3/ 3 3/ 2 7/ 3 8/ 5 14/ 9 2/ 5 1/ 2 3/ 3 10/ 7 1/ 1
GFS-T12 1/ 5 33/ 7 14/13 1/ 3 6/ 8
NAM-T12 3/ 3 14/ 5 14/ 9 3/ 3 10/ 7
GFS-CIG 6 8 8 8 8 8 8 7 7 8 8 8 8 8 8 8 8 8 8 8 8
NAM-CIG 6 8 8 8 8 8 8 7 6 8 8 8 8 8 8 8 8 8 8 8 8
GFS-VIS 7 7 7 7 7 6 5 7 7 7 7 7 6 2 1 6 7 7 7 7 5
NAM-VIS 7 7 7 7 7 7 7 6 7 7 7 5 5 3 1 6 7 7 7 6 4
GFS-OBV N N N N NBRBR N N N N NHZFGFGHZ N N N NBR
NAM-OBV N N N N N N NHZ N N NBRBRBRFGHZ N N NHZBR

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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