KD4PYR MOS Compare

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GFS and NAM MOS Compare

KCVG GFS MOS GUIDANCE 3/15/2026 0000 UTC
KCVG NAM MOS GUIDANCE 3/15/2026 0000 UTC

Date/Time UTC	3/15 06:00 Sun	3/15 09:00 Sun	3/15 12:00 Sun	3/15 15:00 Sun	3/15 18:00 Sun	3/15 21:00 Sun	3/16 00:00 Mon	3/16 03:00 Mon	3/16 06:00 Mon	3/16 09:00 Mon	3/16 12:00 Mon	3/16 15:00 Mon	3/16 18:00 Mon	3/16 21:00 Mon	3/17 00:00 Tue	3/17 03:00 Tue	3/17 06:00 Tue	3/17 09:00 Tue	3/17 12:00 Tue	3/17 18:00 Tue	3/18 00:00 Wed
Date/Time Local	3/15 02:00 Sun	3/15 05:00 Sun	3/15 08:00 Sun	3/15 11:00 Sun	3/15 14:00 Sun	3/15 17:00 Sun	3/15 20:00 Sun	3/15 23:00 Sun	3/16 02:00 Mon	3/16 05:00 Mon	3/16 08:00 Mon	3/16 11:00 Mon	3/16 14:00 Mon	3/16 17:00 Mon	3/16 20:00 Mon	3/16 23:00 Mon	3/17 02:00 Tue	3/17 05:00 Tue	3/17 08:00 Tue	3/17 14:00 Tue	3/17 20:00 Tue
GFS-X/N							74				35				37				18		30
NAM-X/N							72				34				34				15		32
GFS-TMP	47	48	49	62	70	73	68	63	58	52	43	35	34	33	30	26	25	22	19	25	27
NAM-TMP	46	46	49	58	68	71	67	59	53	46	39	34	32	30	26	26	22	19	16	28	28
GFS-DPT	29	33	38	46	49	49	50	50	46	41	33	23	19	17	15	15	12	10	7	4	6
NAM-DPT	26	31	36	43	47	50	52	52	46	38	31	27	23	20	18	13	12	10	8	7	7
GFS-CLD	SC	FW	FW	BK	OV	OV	OV	OV	OV	OV	OV	OV	OV	OV	OV	OV	OV	OV	BK	BK	FW
NAM-CLD	BK	SC	BK	BK	BK	OV	OV	OV	OV	OV	OV	OV	OV	OV	OV	OV	OV	OV	BK	SC	CL
GFS-WDR	10	12	16	17	18	17	16	16	21	24	25	26	26	27	27	27	27	27	28	28	27
NAM-WDR	10	11	14	16	17	18	17	17	18	26	25	25	26	27	27	28	27	28	28	28	23
GFS-WSP	11	09	10	17	20	23	19	24	19	18	16	19	20	22	17	17	13	15	14	13	06
NAM-WSP	09	08	09	11	19	21	15	21	17	13	16	17	15	18	16	14	10	10	12	09	05
GFS-P06			0		1		4		71		80		39		44		5		4	0	0
NAM-P06			10		4		5		69		79		54		44		20		14	1	0
GFS-P12							5				98				44				23		0
NAM-P12							5				82				67				20		6
GFS-Q06			0		0		0		3		2		0		1		0		0	0	0
NAM-Q06			0		0		0		3		3		1		1		0		0	0	0
GFS-Q12							0				4				1				0		0
NAM-Q12							0				4				1				0		0
GFS-T06			1/ 0		10/12		12/41		18/27		2/11		1/ 9		3/ 4		2/ 1		1/ 4		0/ 0
NAM-T06			0/ 3		14/18		15/44		19/21		6/ 9		0/ 1		3/13		1/ 0		1/ 0		0/ 4
GFS-T12					10/18				22/45				4/15				3/ 7			1/ 7
NAM-T12					14/18				24/44				8/ 9				4/13			1/ 4
GFS-POZ	0	0	0	0	0	0	2	1	0	0	0	0	2	0	1	1	0	0	1	0	0
NAM-POZ	0	0	1	0	0	1	0	0	1	0	0	0	0	0	0	0	1	1	1	0	1
GFS-POS	0	0	0	0	1	0	0	0	0	27	70	95	96	95	97	98	98	96	97	96	96
NAM-POS	0	5	0	0	0	0	0	0	0	17	56	83	97	97	97	95	95	96	96	95	93
GFS-TYP	R	R	R	R	R	R	R	R	R	R	S	S	S	S	S	S	S	S	S	S	S
NAM-TYP	R	R	R	R	R	R	R	R	R	R	S	S	S	S	S	S	S	S	S	S	S
GFS-SNW											0								0
NAM-SNW											0								1
GFS-CIG	8	8	8	8	7	6	6	6	6	5	6	6	6	6	6	6	6	6	6	7	8
NAM-CIG	8	8	8	8	8	6	8	6	6	4	6	4	5	6	6	6	6	6	6	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	5	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	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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