KD4PYR MOS Compare

GFS and NAM MOS Compare

KCVG GFS MOS GUIDANCE 5/10/2026 0600 UTC
KCVG NAM MOS GUIDANCE 5/10/2026 0000 UTC

Date/Time UTC	5/10 06:00 Sun	5/10 09:00 Sun	5/10 12:00 Sun	5/10 15:00 Sun	5/10 18:00 Sun	5/10 21:00 Sun	5/11 00:00 Mon	5/11 03:00 Mon	5/11 06:00 Mon	5/11 09:00 Mon	5/11 12:00 Mon	5/11 15:00 Mon	5/11 18:00 Mon	5/11 21:00 Mon	5/12 00:00 Tue	5/12 03:00 Tue	5/12 06:00 Tue	5/12 09:00 Tue	5/12 12:00 Tue	5/12 15:00 Tue	5/12 18:00 Tue	5/13 00:00 Wed	5/13 06:00 Wed
Date/Time Local	5/10 02:00 Sun	5/10 05:00 Sun	5/10 08:00 Sun	5/10 11:00 Sun	5/10 14:00 Sun	5/10 17:00 Sun	5/10 20:00 Sun	5/10 23:00 Sun	5/11 02:00 Mon	5/11 05:00 Mon	5/11 08:00 Mon	5/11 11:00 Mon	5/11 14:00 Mon	5/11 17:00 Mon	5/11 20:00 Mon	5/11 23:00 Mon	5/12 02:00 Tue	5/12 05:00 Tue	5/12 08:00 Tue	5/12 11:00 Tue	5/12 14:00 Tue	5/12 20:00 Tue	5/13 02:00 Wed
GFS-X/N	--	--					73				47				70				43			71
NAM-X/N							70				45				69				47	--		72	--
GFS-TMP	--	--	57	65	70	71	66	58	54	50	51	61	67	68	62	54	49	46	47	59	67	65	56
NAM-TMP	60	57	56	62	67	67	60	56	52	48	49	59	66	67	63	57	53	50	51	--	68	66	--
GFS-DPT	--	--	49	48	45	43	41	41	40	40	40	38	35	34	34	36	36	36	37	38	38	40	44
NAM-DPT	51	51	51	52	50	45	42	39	39	37	38	36	36	35	37	42	42	42	43	--	44	44	--
GFS-CLD	--	--	OV	BK	BK	BK	BK	BK	BK	FW	FW	FW	BK	BK	FW	CL	CL	CL	CL	CL	FW	BK	OV
NAM-CLD	OV	OV	OV	OV	BK	BK	OV	OV	BK	OV	FW	FW	SC	BK	BK	CL	CL	FW	FW	--	SC	SC	--
GFS-WDR	--	--	01	36	32	32	34	01	02	02	01	01	34	35	01	05	08	11	12	16	19	18	21
NAM-WDR	23	25	34	04	34	33	34	01	04	07	10	15	31	31	33	02	06	08	10	--	23	22	--
GFS-WSP	--	--	05	06	07	09	09	08	08	05	05	07	10	11	10	05	04	05	05	06	06	07	07
NAM-WSP	05	04	06	05	07	08	10	09	06	04	03	04	06	08	08	05	04	05	05	--	07	06	--
GFS-P06	--	--			12		7		7		1		0		0		2		0		0	0	14
NAM-P06			57		26		4		6		6		3		0		0		3	--	0	5	--
GFS-P12	--	--					13				7				0				3			0
NAM-P12							26				8				6				3	--		7	--
GFS-Q06	--	--			0		0		0		0		0		0		0		0		0	0	0
NAM-Q06			1		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	--	--			2/ 1		6/ 9		2/ 7		0/ 0		0/ 3		0/ 9		0/ 0		0/ 0		0/ 0		3/ 8
NAM-T06			21/ 4		2/ 2		0/ 9		0/ 9		0/ 3		0/ 5		4/11		2/ 2		0/ 0	--		0/ 9	--
GFS-T12	--	--							9/16				0/ 3				0/ 9				0/ 2		3/ 8
NAM-T12					21/ 5				0/11				0/ 5				4/11			--	0/ 2		--
GFS-POZ	--	--	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0
NAM-POZ	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	--	0	0	--
GFS-POS	--	--	0	0	0	0	1	0	2	2	0	0	2	3	2	3	1	0	0	0	0	0	0
NAM-POS	0	1	0	0	0	0	1	2	2	2	2	1	2	2	2	4	2	0	6	--	0	0	--
GFS-TYP	--	--	R	R	R	R	R	R	R	R	R	R	R	R	R	R	R	R	R	R	R	R	R
NAM-TYP	R	R	R	R	R	R	R	R	R	R	R	R	R	R	R	R	R	R	R	--	R	R	--
GFS-SNW	--	--									0								0
NAM-SNW											0								0	--			--
GFS-CIG	--	--	7	7	7	7	8	8	8	8	8	8	6	7	8	8	8	8	8	8	8	8	7
NAM-CIG	8	8	6	5	6	8	7	7	8	8	8	8	8	7	7	8	8	8	8	--	8	8	--
GFS-VIS	--	--	7	7	7	7	7	7	7	7	7	7	7	7	7	7	7	7	7	7	7	7	7
NAM-VIS	7	7	7	7	7	7	7	7	7	7	7	7	7	7	7	7	7	7	7	--	7	7	--
GFS-OBV	--	--	N	N	N	N	N	N	N	N	N	N	N	N	N	N	N	N	N	N	N	N	N
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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