KD4PYR MOS Compare

GFS and NAM MOS Compare

KCVG GFS MOS GUIDANCE 4/26/2026 0600 UTC
KCVG NAM MOS GUIDANCE 4/26/2026 0000 UTC

Date/Time UTC	4/26 06:00 Sun	4/26 09:00 Sun	4/26 12:00 Sun	4/26 15:00 Sun	4/26 18:00 Sun	4/26 21:00 Sun	4/27 00:00 Mon	4/27 03:00 Mon	4/27 06:00 Mon	4/27 09:00 Mon	4/27 12:00 Mon	4/27 15:00 Mon	4/27 18:00 Mon	4/27 21:00 Mon	4/28 00:00 Tue	4/28 03:00 Tue	4/28 06:00 Tue	4/28 09:00 Tue	4/28 12:00 Tue	4/28 15:00 Tue	4/28 18:00 Tue	4/29 00:00 Wed	4/29 06:00 Wed
Date/Time Local	4/26 02:00 Sun	4/26 05:00 Sun	4/26 08:00 Sun	4/26 11:00 Sun	4/26 14:00 Sun	4/26 17:00 Sun	4/26 20:00 Sun	4/26 23:00 Sun	4/27 02:00 Mon	4/27 05:00 Mon	4/27 08:00 Mon	4/27 11:00 Mon	4/27 14:00 Mon	4/27 17:00 Mon	4/27 20:00 Mon	4/27 23:00 Mon	4/28 02:00 Tue	4/28 05:00 Tue	4/28 08:00 Tue	4/28 11:00 Tue	4/28 14:00 Tue	4/28 20:00 Tue	4/29 02:00 Wed
GFS-X/N	--	--					72				53				80				59			74
NAM-X/N							69				52				79				59	--		74	--
GFS-TMP	--	--	49	60	67	71	68	63	60	56	57	70	77	78	73	67	64	62	61	63	69	68	61
NAM-TMP	58	55	52	57	64	68	66	60	57	55	56	69	75	78	74	67	64	62	62	--	70	69	--
GFS-DPT	--	--	39	44	45	44	45	45	44	44	46	50	53	55	55	54	54	54	53	54	54	50	52
NAM-DPT	49	48	46	45	46	47	47	48	48	48	50	55	56	56	56	52	52	52	53	--	59	58	--
GFS-CLD	--	--	BK	FW	CL	CL	CL	CL	CL	CL	CL	SC	BK	BK	BK	OV	OV	OV	OV	OV	BK	BK	OV
NAM-CLD	BK	OV	OV	BK	CL	FW	CL	CL	CL	CL	CL	SC	BK	BK	BK	OV	OV	OV	OV	--	OV	OV	--
GFS-WDR	--	--	05	07	06	06	07	08	09	10	12	17	18	16	15	18	19	19	19	22	25	30	09
NAM-WDR	05	05	06	06	05	06	08	10	10	10	11	14	15	16	15	16	17	19	20	--	23	20	--
GFS-WSP	--	--	10	09	08	09	08	08	09	07	07	10	12	12	14	17	15	15	15	14	14	05	05
NAM-WSP	14	11	10	06	08	08	08	08	07	07	10	10	12	12	15	16	19	13	15	--	14	06	--
GFS-P06	--	--			0		0		1		1		4		9		60		59		12	5	27
NAM-P06			3		2		2		2		5		3		6		10		41	--	16	20	--
GFS-P12	--	--					0				1				9				73			19
NAM-P12							2				5				6				58	--		26	--
GFS-Q06	--	--			0		0		0		0		0		0		2		2		0	0	0
NAM-Q06			0		0		0		0		0		0		0		0		1	--	0	0	--
GFS-Q12	--	--					0				0				0				4			0
NAM-Q12							0				0				0				2	--		0	--
GFS-T06	--	--			0/ 0		0/ 0		0/ 0		0/ 0		0/ 5		9/22		31/18		23/10		5/ 8		24/ 6
NAM-T06			0/ 2		0/ 0		0/ 0		0/ 0		0/ 0		0/ 3		8/22		20/20		38/13	--		10/30	--
GFS-T12	--	--							0/ 0				0/ 5				31/22				23/13		28/13
NAM-T12					0/ 2				0/ 0				0/ 3				20/26			--	40/15		--
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	1	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	0	0	1	0	0	0	0	1	0	0	0	0	0	0	0	0	0
NAM-POS	0	0	0	0	0	1	0	0	0	0	0	0	0	0	0	0	0	0	0	--	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	--	--	4	8	8	8	8	8	8	8	8	8	8	8	8	7	6	5	6	5	6	8	6
NAM-CIG	4	4	4	5	8	8	8	8	8	8	8	8	8	8	8	7	7	6	4	--	4	6	--
GFS-VIS	--	--	7	7	7	7	7	7	7	7	7	7	7	7	7	7	5	7	7	7	7	7	5
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	BR	N	N	N	N	N	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.

8,906 Views