KD4PYR MOS Compare

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GFS and NAM MOS Compare

KCVG GFS MOS GUIDANCE 1/22/2026 1200 UTC
KCVG NAM MOS GUIDANCE 1/22/2026 1200 UTC

Date/Time UTC	1/22 18:00 Thu	1/22 21:00 Thu	1/23 00:00 Fri	1/23 03:00 Fri	1/23 06:00 Fri	1/23 09:00 Fri	1/23 12:00 Fri	1/23 15:00 Fri	1/23 18:00 Fri	1/23 21:00 Fri	1/24 00:00 Sat	1/24 03:00 Sat	1/24 06:00 Sat	1/24 09:00 Sat	1/24 12:00 Sat	1/24 15:00 Sat	1/24 18:00 Sat	1/24 21:00 Sat	1/25 00:00 Sun	1/25 06:00 Sun	1/25 12:00 Sun
Date/Time Local	1/22 13:00 Thu	1/22 16:00 Thu	1/22 19:00 Thu	1/22 22:00 Thu	1/23 01:00 Fri	1/23 04:00 Fri	1/23 07:00 Fri	1/23 10:00 Fri	1/23 13:00 Fri	1/23 16:00 Fri	1/23 19:00 Fri	1/23 22:00 Fri	1/24 01:00 Sat	1/24 04:00 Sat	1/24 07:00 Sat	1/24 10:00 Sat	1/24 13:00 Sat	1/24 16:00 Sat	1/24 19:00 Sat	1/25 01:00 Sun	1/25 07:00 Sun
GFS-N/X							15				17				3				12		11
NAM-N/X							13				21				-2				17		12
GFS-TMP	31	33	30	27	25	21	16	16	14	13	10	9	6	5	4	8	9	9	10	13	14
NAM-TMP	32	33	28	24	21	18	15	17	18	17	10	6	3	2	1	9	13	14	14	15	15
GFS-DPT	8	9	10	12	12	9	4	1	-5	-9	-9	-7	-7	-7	-7	-5	-4	-1	2	10	12
NAM-DPT	9	7	7	7	8	8	7	2	-3	-8	-8	10	10	11	10	-5	-1	3	5	4	6
GFS-CLD	BK	SC	OV	BK	FW	BK	BK	OV	BK	BK	SC	BK	BK	OV	OV	OV	OV	OV	OV	OV	OV
NAM-CLD	FW	SC	BK	BK	BK	BK	OV	BK	BK	SC	SC	BK	SC	BK	OV	OV	OV	OV	OV	OV	OV
GFS-WDR	27	27	26	26	29	32	33	33	33	33	35	01	03	03	05	06	05	05	05	04	03
NAM-WDR	27	26	26	26	27	29	33	33	33	34	35	02	03	04	05	06	05	05	06	05	05
GFS-WSP	10	10	06	06	06	08	14	14	14	15	14	13	12	14	13	12	11	13	13	12	11
NAM-WSP	10	09	06	05	05	04	09	13	13	13	14	12	11	11	11	09	12	11	14	13	14
GFS-P06			0		0		1		1		2		0		1		38		66	55	56
NAM-P06			0		0		4		6		5		6		7		21		71	55	82
GFS-P12							1				2				2				70		74
NAM-P12							4				6				7				90		88
GFS-Q06			0		0		0		0		0		0		0		0		1	1	1
NAM-Q06			0		0		0		0		0		0		0		0		2	1	3
GFS-Q12							0				0				0				1		2
NAM-Q12							0				0				0				2		3
GFS-T06			0/ 9		0/14		0/14		0/11		0/ 0		0/ 8		0/ 4		0/ 6		0/ 1		0/ 1
NAM-T06			0/ 9		0/11		0/ 4		0/ 8		0/ 9		0/14		0/ 6		0/ 6		0/ 8		1/ 5
GFS-T12					0/20				0/14				0/20				0/10			0/12
NAM-T12					0/12				0/ 8				0/14				1/ 6			2/15
GFS-POZ	2	1	3	0	2	1	1	1	0	2	2	2	2	0	1	1	0	0	0	0	5
NAM-POZ	3	1	2	2	1	0	1	1	2	2	2	2	1	1	1	2	2	2	3	8	20
GFS-POS	92	99	95	00	98	00	99	99	00	99	98	98	99	99	99	98	00	99	00	98	92
NAM-POS	96	99	99	99	99	99	99	99	98	98	97	98	98	98	99	98	98	96	97	92	73
GFS-TYP	S	S	S	S	S	S	S	S	S	S	S	S	S	S	S	S	S	S	S	S	S
NAM-TYP	S	S	S	S	S	S	S	S	S	S	S	S	S	S	S	S	S	S	S	S	S
GFS-SNW							0								0						6
NAM-SNW							0								0						4
GFS-CIG	8	8	8	8	8	8	8	8	8	8	8	8	8	8	7	7	6	4	3	4	3
NAM-CIG	8	8	8	8	8	8	8	8	8	8	8	8	8	8	7	7	6	6	6	6	5
GFS-VIS	7	7	7	7	7	7	7	7	7	7	7	7	7	7	7	7	7	4	3	4	4
NAM-VIS	7	7	7	7	7	7	7	7	7	7	7	7	7	7	7	7	7	2	2	7	7
GFS-OBV	N	N	N	N	N	N	N	N	N	N	N	N	N	N	N	N	N	N	BR	BR	BR
NAM-OBV	N	N	N	N	N	N	N	N	N	N	N	N	N	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

DT = The day of the month, denoted by the standard three or four letter abbreviation
HR = Hour of the day in UTC time. This is the hour at which the forecast is valid, or if the forecast is valid for a period, the end of the forecast period.
N/X = nighttime minimum/daytime maximum surface temperatures.
TMP = surface temperature valid at that hour.
DPT = surface dewpoint valid at that hour.
CLD = forecast categories of total sky cover valid at that hour.
WDR = forecasts of the 10-meter wind direction at the hour, given in tens of degrees.
WSP = forecasts of the 10-meter wind speed at the hour, given in knots.
P06 = probability of precipitation (PoP) during a 6-h period ending at that time.
P12 = PoP during a 12-h period ending at that time.
Q06 = quantitative precipitation forecast (QPF) category for liquid equivalent precipitation amount during a 6-h period ending at that time.
Q12 = QPF category for liquid equivalent precipitation amount during a 12-h period ending at the indicated time.
T06 = probability of thunderstorms/conditional probability of severe thunderstorms during the 6-hr period ending at the indicated time.
T12 = probability of thunderstorms/conditional probability of severe thunderstorms during the 12-hr period ending at the indicated time.
SNW = snow fall categorical forecasts during a 24-h period ending at the indicated time.
POZ = conditional probability of freezing pcp occurring at the hour.
POS = conditional probability of snow occurring at the hour.
TYP = conditional precipitation type at the hour.
CIG = ceiling height categorical forecasts at the hour.
VIS = visibility categorical forecasts at the hour.
OBV = obstruction to vision categorical forecasts at the hour.

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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