KD4PYR MOS Compare

GFS and NAM MOS Compare

KCVG GFS MOS GUIDANCE 2/12/2026 1800 UTC
KCVG NAM MOS GUIDANCE 2/13/2026 0000 UTC

Date/Time UTC	2/13 00:00 Fri	2/13 03:00 Fri	2/13 06:00 Fri	2/13 09:00 Fri	2/13 12:00 Fri	2/13 15:00 Fri	2/13 18:00 Fri	2/13 21:00 Fri	2/14 00:00 Sat	2/14 03:00 Sat	2/14 06:00 Sat	2/14 09:00 Sat	2/14 12:00 Sat	2/14 15:00 Sat	2/14 18:00 Sat	2/14 21:00 Sat	2/15 00:00 Sun	2/15 03:00 Sun	2/15 06:00 Sun	2/15 09:00 Sun	2/15 12:00 Sun	2/15 18:00 Sun	2/16 00:00 Mon
Date/Time Local	2/12 19:00 Thu	2/12 22:00 Thu	2/13 01:00 Fri	2/13 04:00 Fri	2/13 07:00 Fri	2/13 10:00 Fri	2/13 13:00 Fri	2/13 16:00 Fri	2/13 19:00 Fri	2/13 22:00 Fri	2/14 01:00 Sat	2/14 04:00 Sat	2/14 07:00 Sat	2/14 10:00 Sat	2/14 13:00 Sat	2/14 16:00 Sat	2/14 19:00 Sat	2/14 22:00 Sat	2/15 01:00 Sun	2/15 04:00 Sun	2/15 07:00 Sun	2/15 13:00 Sun	2/15 19:00 Sun
GFS-N/X					28				47				31				53			--	39		--
NAM-X/N	--	--							46				33				52				40		49
GFS-TMP	37	34	31	30	30	36	43	46	41	38	36	34	34	41	49	53	47	44	43	--	41	47	--
NAM-TMP	--	--	32	30	30	36	42	45	42	40	38	36	35	41	48	51	48	45	44	43	42	45	42
GFS-DPT	23	24	24	25	25	26	26	26	26	26	26	26	26	29	31	31	32	33	34	--	36	38	--
NAM-DPT	--	--	24	24	24	26	27	27	28	29	28	28	28	29	31	33	36	36	37	38	38	40	37
GFS-CLD	OV	CL	CL	CL	CL	CL	CL	CL	CL	CL	CL	CL	CL	CL	SC	BK	OV	OV	OV	--	OV	OV	--
NAM-CLD	--	--	CL	CL	CL	FW	CL	FW	BK	BK	CL	CL	FW	FW	SC	SC	OV	OV	OV	OV	OV	OV	OV
GFS-WDR	01	06	07	07	13	16	19	20	19	20	21	21	19	17	18	16	14	14	11	--	08	07	--
NAM-WDR	--	--	20	07	12	16	20	21	18	19	20	19	18	18	18	18	13	13	10	11	11	06	03
GFS-WSP	03	03	02	02	03	04	06	06	05	04	05	04	03	04	06	05	05	04	05	--	08	07	--
NAM-WSP	--	--	01	02	02	02	04	05	04	04	04	03	02	03	04	04	04	04	06	07	10	07	08
GFS-P06			2		1		0		0		0		0		0		0		50	--	83	67	--
NAM-P06	--	--			1		0		0		0		0		1		4		58		91	62	5
GFS-P12					2				0				0				0			--	83		--
NAM-P12	--	--							1				0				4				91		74
GFS-Q06			0		0		0		0		0		0		0		0		1	--	3	1	--
NAM-Q06	--	--			0		0		0		0		0		0		0		1		3	2	0
GFS-Q12					0				0				0				0			--	3		--
NAM-Q12	--	--							0				0				0				4		2
GFS-T06			0/ 4		0/ 0		0/ 1		0/ 1		0/ 5		0/ 0		0/ 0		1/ 0		1/10	--		1/ 0	--
NAM-T06	--	--			0/ 0		0/ 3		0/ 0		0/ 0		0/ 3		0/ 5		1/ 4		1/22		1/ 9		1/ 1
GFS-T12							0/ 4				1/17				0/ 6				1/25	--		1/ 8	--
NAM-T12	--	--					0/ 5				0/ 3				0/ 5				1/22			1/ 9
GFS-POZ	0	0	0	0	0	3	0	0	0	0	0	0	3	2	0	2	2	2	1	--	2	2	--
NAM-POZ	--	--	2	5	7	6	0	0	0	0	4	1	7	6	2	1	0	0	1	1	1	3	3
GFS-POS	70	83	93	94	82	60	45	25	23	7	24	60	37	1	3	0	3	2	5	--	2	5	--
NAM-POS	--	--	83	85	80	74	39	25	26	33	42	56	31	21	12	4	5	4	4	4	7	3	2
GFS-TYP	S	S	S	S	S	S	R	R	R	R	R	S	R	R	R	R	R	R	R	--	R	R	--
NAM-TYP	--	--	S	S	S	S	R	R	R	R	R	S	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	8	8	8	8	8	8	8	8	8	8	8	7	6	--	2	3	--
NAM-CIG	--	--	8	8	8	8	8	8	8	8	8	8	8	8	8	8	8	6	3	3	3	3	5
GFS-VIS	7	7	7	7	7	7	7	7	7	7	7	7	7	7	7	7	7	7	4	--	3	5	--
NAM-VIS	--	--	7	7	7	7	7	7	7	7	7	7	7	7	7	7	7	5	3	3	4	4	7
GFS-OBV	N	N	N	N	N	N	N	N	N	N	N	N	N	N	N	N	N	N	BR	--	BR	BR	--
NAM-OBV	--	--	N	N	N	N	N	N	N	N	N	N	N	N	N	N	N	N	BR	BR	BR	BR	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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