KD4PYR MOS Compare

GFS and NAM MOS Compare

KCVG GFS MOS GUIDANCE 1/06/2026 0000 UTC
KCVG NAM MOS GUIDANCE 1/06/2026 0000 UTC

Date/Time UTC	1/6 06:00 Tue	1/6 09:00 Tue	1/6 12:00 Tue	1/6 15:00 Tue	1/6 18:00 Tue	1/6 21:00 Tue	1/7 00:00 Wed	1/7 03:00 Wed	1/7 06:00 Wed	1/7 09:00 Wed	1/7 12:00 Wed	1/7 15:00 Wed	1/7 18:00 Wed	1/7 21:00 Wed	1/8 00:00 Thu	1/8 03:00 Thu	1/8 06:00 Thu	1/8 09:00 Thu	1/8 12:00 Thu	1/8 18:00 Thu	1/9 00:00 Fri
Date/Time Local	1/6 01:00 Tue	1/6 04:00 Tue	1/6 07:00 Tue	1/6 10:00 Tue	1/6 13:00 Tue	1/6 16:00 Tue	1/6 19:00 Tue	1/6 22:00 Tue	1/7 01:00 Wed	1/7 04:00 Wed	1/7 07:00 Wed	1/7 10:00 Wed	1/7 13:00 Wed	1/7 16:00 Wed	1/7 19:00 Wed	1/7 22:00 Wed	1/8 01:00 Thu	1/8 04:00 Thu	1/8 07:00 Thu	1/8 13:00 Thu	1/8 19:00 Thu
GFS-X/N							58				39				57				38		65
NAM-X/N							53				39				52				37		58
GFS-TMP	45	45	46	50	55	56	52	48	44	42	40	44	52	56	49	46	44	42	41	61	62
NAM-TMP	46	47	48	47	50	50	48	46	45	43	41	44	48	50	46	40	40	40	41	54	55
GFS-DPT	36	37	39	45	47	46	44	41	39	37	35	37	38	36	35	33	34	34	34	41	48
NAM-DPT	40	42	43	44	46	45	44	42	41	40	38	38	40	39	38	34	35	36	37	46	49
GFS-CLD	BK	OV	OV	OV	OV	OV	BK	SC	SC	SC	BK	SC	SC	CL	CL	CL	CL	CL	BK	OV	OV
NAM-CLD	FW	OV	OV	OV	OV	OV	OV	OV	OV	OV	OV	OV	BK	BK	FW	SC	FW	OV	OV	OV	OV
GFS-WDR	19	18	19	21	23	24	25	26	25	27	28	25	24	23	20	18	17	15	15	17	15
NAM-WDR	17	18	19	20	22	24	27	27	28	28	26	25	23	20	17	15	14	15	16	16	16
GFS-WSP	06	09	11	13	14	15	10	07	06	06	05	04	06	06	05	05	04	06	06	09	12
NAM-WSP	04	06	08	11	11	12	09	08	07	06	04	05	05	05	04	04	04	05	06	08	16
GFS-P06			0		2		1		3		1		1		1		1		1	0	11
NAM-P06			3		41		23		12		13		5		2		2		3	9	34
GFS-P12							4				3				2				1		11
NAM-P12							43				23				5				4		35
GFS-Q06			0		0		0		0		0		0		0		0		0	0	0
NAM-Q06			0		0		0		0		0		0		0		0		0	0	0
GFS-Q12							0				0				0				0		0
NAM-Q12							0				0				0				0		0
GFS-T06			0/ 0		0/ 6		1/17		0/ 6		0/ 1		0/ 1		0/ 2		0/ 0		0/ 0		1/ 7
NAM-T06			0/ 0		0/ 1		0/17		1/ 6		0/ 1		0/ 5		0/ 5		0/ 7		0/ 3		1/24
GFS-T12					0/ 6				1/17				1/ 1				1/10			0/ 1
NAM-T12					0/ 1				1/17				0/ 5				0/ 7			0/ 3
GFS-POZ	0	0	0	0	1	1	2	0	1	0	1	1	0	0	1	1	1	1	1	2	3
NAM-POZ	0	0	0	1	1	3	1	0	0	1	0	0	0	1	1	1	1	1	1	2	2
GFS-POS	0	0	0	0	0	1	0	0	1	2	0	1	2	1	3	1	2	1	1	2	2
NAM-POS	0	1	1	1	1	0	1	2	2	2	2	2	2	3	4	6	2	4	5	2	2
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	7	6	4	4	6	8	8	8	8	8	8	8	8	8	8	8	8	8	8	6
NAM-CIG	8	7	4	3	3	4	4	5	5	4	4	4	4	8	8	8	8	8	7	7	4
GFS-VIS	7	7	7	7	7	7	7	7	7	7	6	7	7	7	7	7	7	7	7	7	7
NAM-VIS	7	7	7	5	7	7	7	7	6	5	5	5	7	7	7	7	7	2	6	7	3
GFS-OBV	N	N	N	N	N	N	N	N	N	N	BR	N	N	N	N	N	N	N	N	N	N
NAM-OBV	N	N	N	BR	HZ	N	N	N	BR	BR	BR	BR	N	N	N	N	N	FG	BR	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.

8,606 Views