KD4PYR MOS Compare

GFS and NAM MOS Compare

KCVG GFS MOS GUIDANCE 3/29/2026 0600 UTC
KCVG NAM MOS GUIDANCE 3/29/2026 0000 UTC

Date/Time UTC	3/29 06:00 Sun	3/29 09:00 Sun	3/29 12:00 Sun	3/29 15:00 Sun	3/29 18:00 Sun	3/29 21:00 Sun	3/30 00:00 Mon	3/30 03:00 Mon	3/30 06:00 Mon	3/30 09:00 Mon	3/30 12:00 Mon	3/30 15:00 Mon	3/30 18:00 Mon	3/30 21:00 Mon	3/31 00:00 Tue	3/31 03:00 Tue	3/31 06:00 Tue	3/31 09:00 Tue	3/31 12:00 Tue	3/31 15:00 Tue	3/31 18:00 Tue	4/1 00:00 Wed	4/1 06:00 Wed
Date/Time Local	3/29 02:00 Sun	3/29 05:00 Sun	3/29 08:00 Sun	3/29 11:00 Sun	3/29 14:00 Sun	3/29 17:00 Sun	3/29 20:00 Sun	3/29 23:00 Sun	3/30 02:00 Mon	3/30 05:00 Mon	3/30 08:00 Mon	3/30 11:00 Mon	3/30 14:00 Mon	3/30 17:00 Mon	3/30 20:00 Mon	3/30 23:00 Mon	3/31 02:00 Tue	3/31 05:00 Tue	3/31 08:00 Tue	3/31 11:00 Tue	3/31 14:00 Tue	3/31 20:00 Tue	4/1 02:00 Wed
GFS-X/N	--	--					64				54				72				61			79
NAM-X/N							63				47				64				57	--		73	--
GFS-TMP	--	--	34	51	60	64	61	58	58	57	57	63	68	70	67	65	65	64	63	71	75	72	67
NAM-TMP	39	37	38	48	58	62	57	48	48	49	51	55	60	62	60	62	61	60	60	--	69	69	--
GFS-DPT	--	--	21	28	30	33	37	42	44	46	48	51	53	54	54	54	54	54	55	57	57	55	54
NAM-DPT	22	23	25	27	31	33	34	36	38	41	44	49	53	55	55	54	54	54	55	--	58	57	--
GFS-CLD	--	--	CL	SC	SC	SC	BK	OV	OV	OV	OV	OV	OV	OV	OV	OV	OV	OV	OV	OV	BK	BK	FW
NAM-CLD	CL	CL	FW	SC	SC	SC	BK	OV	OV	OV	OV	OV	OV	OV	OV	OV	OV	OV	OV	--	OV	BK	--
GFS-WDR	--	--	15	20	21	20	19	19	20	20	20	21	21	21	20	20	20	20	20	20	21	20	20
NAM-WDR	13	15	16	20	20	20	18	19	20	21	20	20	21	20	19	20	20	20	19	--	20	20	--
GFS-WSP	--	--	06	10	14	13	08	10	11	12	11	14	15	15	13	13	12	11	13	17	19	13	13
NAM-WSP	05	05	05	07	10	11	07	09	10	09	10	11	12	13	10	12	10	10	12	--	15	13	--
GFS-P06	--	--			0		0		26		27		33		42		21		9		5	11	9
NAM-P06			1		1		1		4		18		30		20		12		17	--	15	10	--
GFS-P12	--	--					0				34				42				22			17
NAM-P12							1				18				30				28	--		16	--
GFS-Q06	--	--			0		0		0		0		0		1		0		0		0	0	0
NAM-Q06			0		0		0		0		0		0		0		0		0	--	0	0	--
GFS-Q12	--	--					0				0				1				0			0
NAM-Q12							0				0				0				0	--		0	--
GFS-T06	--	--			2/ 0		5/ 0		10/ 0		7/ 0		4/ 0		17/17		19/10		8/ 2		7/ 6		5/11
NAM-T06			0/ 0		2/ 0		1/11		3/ 1		2/ 1		2/ 1		12/12		3/ 5		4/ 2	--		8/21	--
GFS-T12	--	--							16/ 8				9/ 2				22/17				14/ 9		18/26
NAM-T12					3/ 0				3/11				3/ 1				14/12			--	4/ 6		--
GFS-POZ	--	--	6	3	0	0	1	0	1	0	0	0	0	0	0	0	0	0	0	0	0	0	0
NAM-POZ	1	1	3	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	--	0	0	--
GFS-POS	--	--	46	2	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0
NAM-POS	8	14	5	10	0	0	0	0	0	0	0	0	0	0	0	0	0	0	1	--	0	0	--
GFS-TYP	--	--	S	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	--	--	8	8	8	8	8	7	7	6	6	5	5	6	6	6	6	7	7	6	7	8	8
NAM-CIG	8	8	8	8	8	8	8	7	7	6	6	4	4	6	6	6	6	5	5	--	6	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	5	7	7	7	7	7	6	--	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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