KD4PYR MOS Compare

GFS and NAM MOS Compare

KCVG GFS MOS GUIDANCE 1/13/2026 0000 UTC
KCVG NAM MOS GUIDANCE 1/13/2026 0000 UTC

Date/Time UTC	1/13 06:00 Tue	1/13 09:00 Tue	1/13 12:00 Tue	1/13 15:00 Tue	1/13 18:00 Tue	1/13 21:00 Tue	1/14 00:00 Wed	1/14 03:00 Wed	1/14 06:00 Wed	1/14 09:00 Wed	1/14 12:00 Wed	1/14 15:00 Wed	1/14 18:00 Wed	1/14 21:00 Wed	1/15 00:00 Thu	1/15 03:00 Thu	1/15 06:00 Thu	1/15 09:00 Thu	1/15 12:00 Thu	1/15 18:00 Thu	1/16 00:00 Fri
Date/Time Local	1/13 01:00 Tue	1/13 04:00 Tue	1/13 07:00 Tue	1/13 10:00 Tue	1/13 13:00 Tue	1/13 16:00 Tue	1/13 19:00 Tue	1/13 22:00 Tue	1/14 01:00 Wed	1/14 04:00 Wed	1/14 07:00 Wed	1/14 10:00 Wed	1/14 13:00 Wed	1/14 16:00 Wed	1/14 19:00 Wed	1/14 22:00 Wed	1/15 01:00 Thu	1/15 04:00 Thu	1/15 07:00 Thu	1/15 13:00 Thu	1/15 19:00 Thu
GFS-X/N							52				38				43				18		28
NAM-X/N							53				37				37				15		27
GFS-TMP	32	31	31	38	48	52	48	45	43	42	41	42	40	37	31	23	21	20	19	24	23
NAM-TMP	36	35	35	40	49	53	49	45	44	42	40	37	34	30	25	21	20	18	17	24	20
GFS-DPT	19	20	21	27	30	31	33	33	33	34	34	35	31	27	22	14	11	11	11	9	9
NAM-DPT	23	23	24	28	32	34	36	36	38	39	37	32	27	21	18	13	13	13	12	7	5
GFS-CLD	FW	CL	CL	SC	SC	BK	OV	OV	OV	OV	OV	OV	OV	OV	BK	BK	BK	OV	OV	OV	CL
NAM-CLD	FW	CL	CL	SC	SC	BK	BK	BK	OV	OV	OV	OV	OV	OV	OV	OV	OV	OV	OV	OV	CL
GFS-WDR	20	20	19	20	21	21	22	22	23	23	25	28	31	32	32	32	32	31	31	30	27
NAM-WDR	21	20	20	20	21	22	23	23	23	25	27	29	30	32	31	31	31	31	30	29	25
GFS-WSP	07	08	11	15	17	18	13	13	11	09	08	11	17	20	20	17	14	13	12	13	05
NAM-WSP	06	07	09	12	15	14	10	10	08	08	08	11	15	19	16	15	12	11	11	11	06
GFS-P06			0		0		0		23		60		49		18		1		8	5	0
NAM-P06			1		2		4		5		63		58		10		3		5	0	0
GFS-P12							0				60				49				12		11
NAM-P12							4				63				58				12		4
GFS-Q06			0		0		0		0		1		1		0		0		0	0	0
NAM-Q06			0		0		0		0		1		1		0		0		0	0	0
GFS-Q12							0				1				1				0		0
NAM-Q12							0				1				1				0		0
GFS-T06			0/ 0		0/ 5		1/25		0/ 4		1/ 0		1/ 2		1/ 5		0/ 7		1/ 0		0/ 1
NAM-T06			0/ 1		0/ 8		0/21		0/ 6		0/ 4		0/ 3		0/14		0/ 3		1/ 0		0/ 6
GFS-T12					0/ 6				1/25				2/ 3				2/13			1/ 2
NAM-T12					0/ 8				0/21				0/ 4				0/14			1/ 3
GFS-POZ	10	12	13	4	0	1	1	0	0	0	0	0	0	0	2	1	1	1	2	0	2
NAM-POZ	16	18	19	8	0	0	1	0	0	0	0	0	0	0	2	2	2	2	2	2	4
GFS-POS	32	45	45	2	3	1	0	1	4	7	16	37	62	79	97	98	99	97	97	00	99
NAM-POS	38	38	33	31	11	1	1	3	7	13	40	63	81	88	98	96	96	97	98	98	94
GFS-TYP	R	S	S	R	R	R	R	R	R	R	R	R	S	S	S	S	S	S	S	S	S
NAM-TYP	S	S	S	R	R	R	R	R	R	R	R	S	S	S	S	S	S	S	S	S	S
GFS-SNW											0								0
NAM-SNW											0								0
GFS-CIG	8	8	8	8	8	8	7	7	6	4	4	4	4	5	6	6	6	6	6	6	8
NAM-CIG	8	8	8	8	8	8	8	8	7	4	3	3	4	5	6	6	6	6	6	6	8
GFS-VIS	7	7	7	7	7	7	7	7	7	4	4	5	7	7	7	7	7	7	7	7	7
NAM-VIS	7	7	7	7	7	7	7	7	7	5	4	5	7	7	7	7	7	7	7	7	7
GFS-OBV	N	N	N	N	N	N	N	N	N	BR	BR	N	N	N	N	N	N	N	N	N	N
NAM-OBV	N	N	N	N	N	N	N	N	N	N	BR	HZ	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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