KD4PYR MOS Compare

GFS and NAM MOS Compare

KCVG GFS MOS GUIDANCE 4/12/2026 0600 UTC
KCVG NAM MOS GUIDANCE 4/12/2026 0000 UTC

Date/Time UTC	4/12 06:00 Sun	4/12 09:00 Sun	4/12 12:00 Sun	4/12 15:00 Sun	4/12 18:00 Sun	4/12 21:00 Sun	4/13 00:00 Mon	4/13 03:00 Mon	4/13 06:00 Mon	4/13 09:00 Mon	4/13 12:00 Mon	4/13 15:00 Mon	4/13 18:00 Mon	4/13 21:00 Mon	4/14 00:00 Tue	4/14 03:00 Tue	4/14 06:00 Tue	4/14 09:00 Tue	4/14 12:00 Tue	4/14 15:00 Tue	4/14 18:00 Tue	4/15 00:00 Wed	4/15 06:00 Wed
Date/Time Local	4/12 02:00 Sun	4/12 05:00 Sun	4/12 08:00 Sun	4/12 11:00 Sun	4/12 14:00 Sun	4/12 17:00 Sun	4/12 20:00 Sun	4/12 23:00 Sun	4/13 02:00 Mon	4/13 05:00 Mon	4/13 08:00 Mon	4/13 11:00 Mon	4/13 14:00 Mon	4/13 17:00 Mon	4/13 20:00 Mon	4/13 23:00 Mon	4/14 02:00 Tue	4/14 05:00 Tue	4/14 08:00 Tue	4/14 11:00 Tue	4/14 14:00 Tue	4/14 20:00 Tue	4/15 02:00 Wed
GFS-X/N	--	--					80				61				76				59			84
NAM-X/N							78				61				72				60	--		78	--
GFS-TMP	--	--	55	70	76	78	74	67	64	63	65	68	72	74	71	65	61	60	62	70	80	78	68
NAM-TMP	56	56	58	67	75	77	71	67	65	63	62	63	67	70	67	65	64	62	62	--	74	73	--
GFS-DPT	--	--	47	53	52	51	51	51	53	54	56	57	58	59	58	58	57	56	58	59	60	58	58
NAM-DPT	42	45	48	52	53	51	51	50	51	53	54	59	61	62	62	57	56	56	56	--	61	61	--
GFS-CLD	--	--	BK	SC	SC	SC	BK	OV	OV	OV	OV	OV	OV	OV	BK	BK	CL	SC	BK	BK	BK	BK	BK
NAM-CLD	SC	FW	SC	FW	SC	BK	BK	OV	OV	OV	OV	OV	OV	OV	OV	OV	OV	OV	OV	--	OV	BK	--
GFS-WDR	--	--	15	19	21	21	19	19	20	22	22	22	21	21	20	19	19	19	20	22	22	20	21
NAM-WDR	12	13	15	19	21	21	20	20	20	22	22	23	22	21	19	19	19	20	20	--	21	21	--
GFS-WSP	--	--	06	09	15	15	09	12	15	16	13	15	15	14	12	11	10	11	12	16	17	13	11
NAM-WSP	06	05	06	09	12	12	09	10	13	12	13	14	12	09	07	09	09	11	11	--	13	10	--
GFS-P06	--	--			2		0		3		31		41		9		7		25		15	3	5
NAM-P06			3		2		3		8		42		20		13		7		17	--	16	9	--
GFS-P12	--	--					2				31				41				43			17
NAM-P12							3				42				24				17	--		16	--
GFS-Q06	--	--			0		0		0		0		1		0		0		0		0	0	0
NAM-Q06			0		0		0		0		1		0		0		0		0	--	0	0	--
GFS-Q12	--	--					0				0				0				0			0
NAM-Q12							0				0				0				0	--		0	--
GFS-T06	--	--			1/ 0		0/ 9		2/ 8		7/ 6		13/ 2		7/17		13/ 9		20/ 5		18/ 6		10/17
NAM-T06			1/ 2		0/ 1		0/12		3/10		6/ 9		7/ 7		11/22		17/11		14/ 8	--		10/28	--
GFS-T12	--	--							2/11				16/ 6				13/17				27/10		22/33
NAM-T12					1/ 2				3/12				7/ 9				20/22			--	16/ 9		--
GFS-POZ	--	--	0	0	0	0	0	0	1	0	0	0	0	0	0	0	0	0	0	0	0	0	0
NAM-POZ	0	1	1	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	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0
NAM-POS	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	1	--	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	--	--	8	8	8	8	8	8	7	7	7	5	5	6	8	8	8	8	8	8	6	8	8
NAM-CIG	8	8	8	8	8	8	8	8	7	7	6	3	4	5	6	6	6	6	6	--	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	5	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	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.

8,849 Views