KD4PYR MOS Compare

GFS and NAM MOS Compare

KCVG GFS MOS GUIDANCE 3/06/2026 1800 UTC
KCVG NAM MOS GUIDANCE 3/06/2026 1200 UTC

Date/Time UTC	3/6 18:00 Fri	3/6 21:00 Fri	3/7 00:00 Sat	3/7 03:00 Sat	3/7 06:00 Sat	3/7 09:00 Sat	3/7 12:00 Sat	3/7 15:00 Sat	3/7 18:00 Sat	3/7 21:00 Sat	3/8 00:00 Sun	3/8 03:00 Sun	3/8 06:00 Sun	3/8 09:00 Sun	3/8 12:00 Sun	3/8 15:00 Sun	3/8 18:00 Sun	3/8 21:00 Sun	3/9 00:00 Mon	3/9 03:00 Mon	3/9 06:00 Mon	3/9 12:00 Mon	3/9 18:00 Mon
Date/Time Local	3/6 13:00 Fri	3/6 16:00 Fri	3/6 19:00 Fri	3/6 22:00 Fri	3/7 01:00 Sat	3/7 04:00 Sat	3/7 07:00 Sat	3/7 10:00 Sat	3/7 13:00 Sat	3/7 16:00 Sat	3/7 19:00 Sat	3/7 22:00 Sat	3/8 01:00 Sun	3/8 05:00 Sun	3/8 08:00 Sun	3/8 11:00 Sun	3/8 14:00 Sun	3/8 17:00 Sun	3/8 20:00 Sun	3/8 23:00 Sun	3/9 02:00 Mon	3/9 08:00 Mon	3/9 14:00 Mon
GFS-N/X	--	--					62				76				49				65			44
NAM-N/X							62				71				45				57	--		45	--
GFS-TMP	--	--	71	68	67	66	65	69	72	73	69	63	58	54	50	54	61	64	58	51	49	47	69
NAM-TMP	74	75	69	66	65	65	65	66	68	67	64	59	55	50	45	46	53	57	52	--	49	48	--
GFS-DPT	--	--	58	59	58	59	59	60	60	58	56	53	49	46	42	39	36	33	33	34	35	38	48
NAM-DPT	61	60	58	56	57	58	59	60	62	61	60	56	51	45	40	39	38	37	37	--	39	40	--
GFS-CLD	--	--	SC	SC	BK	OV	OV	OV	OV	OV	OV	OV	OV	OV	BK	FW	FW	CL	CL	CL	CL	FW	CL
NAM-CLD	OV	BK	BK	BK	OV	OV	OV	OV	OV	OV	OV	OV	OV	OV	OV	BK	CL	CL	CL	--	CL	FW	--
GFS-WDR	--	--	18	18	19	19	19	20	22	23	24	24	27	30	29	28	26	26	21	20	20	19	21
NAM-WDR	18	19	18	18	19	20	20	20	22	22	22	26	29	30	29	26	23	22	20	--	20	20	--
GFS-WSP	--	--	07	09	10	11	12	16	18	16	11	09	09	08	05	07	09	09	04	05	06	06	13
NAM-WSP	09	11	06	06	08	10	12	15	15	13	11	13	12	11	08	08	08	08	06	--	07	06	--
GFS-P06	--	--			0		23		51		43		30		39		7		3		0	2	3
NAM-P06			0		3		13		51		83		51		8		3		2	--	3	6	--
GFS-P12	--	--					23				70				47				8			2
NAM-P12							13				93				67				7	--		6	--
GFS-Q06	--	--			0		0		1		1		0		1		0		0		0	0	0
NAM-Q06			0		0		0		1		3		1		0		0		0	--	0	0	--
GFS-Q12	--	--					0				2				1				0			0
NAM-Q12							0				4				1				0	--		0	--
GFS-T06	--	--			15/11		19/ 7		10/16		15/29		17/11		8/ 6		1/ 2		0/ 2		0/ 2		1/ 3
NAM-T06			21/32		13/11		15/10		14/12		40/28		18/19		1/ 7		0/ 2		0/ 5	--		0/ 5	--
GFS-T12	--	--							27/20				17/29				8/ 9				0/ 6		1/ 6
NAM-T12					27/32				23/12				52/28				1/ 7			--	0/ 7		--
GFS-POZ	--	--	0	0	0	0	0	1	0	1	1	1	1	0	1	1	0	1	1	2	1	1	1
NAM-POZ	0	0	0	1	0	0	1	1	1	1	1	1	0	0	0	0	0	0	1	--	1	1	--
GFS-POS	--	--	0	0	0	0	0	0	0	0	0	0	1	1	0	0	1	0	1	0	1	1	1
NAM-POS	0	0	0	0	0	0	1	1	0	0	0	0	1	2	2	2	2	1	1	--	0	3	--
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					--		0	--
GFS-CIG	--	--	8	8	8	7	6	6	6	7	7	6	6	6	8	8	8	8	8	8	8	8	8
NAM-CIG	7	8	8	8	7	6	6	5	4	4	4	4	4	4	4	5	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	6	5	5	5	6	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	BR	N	N	N	BR	BR	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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