KD4PYR MOS Compare

GFS and NAM MOS Compare

KCVG GFS MOS GUIDANCE 12/22/2025 1200 UTC
KCVG NAM MOS GUIDANCE 12/22/2025 1200 UTC

Date/Time UTC	12/22 18:00 Mon	12/22 21:00 Mon	12/23 00:00 Tue	12/23 03:00 Tue	12/23 06:00 Tue	12/23 09:00 Tue	12/23 12:00 Tue	12/23 15:00 Tue	12/23 18:00 Tue	12/23 21:00 Tue	12/24 00:00 Wed	12/24 03:00 Wed	12/24 06:00 Wed	12/24 09:00 Wed	12/24 12:00 Wed	12/24 15:00 Wed	12/24 18:00 Wed	12/24 21:00 Wed	12/25 00:00 Thu	12/25 06:00 Thu	12/25 12:00 Thu
Date/Time Local	12/22 13:00 Mon	12/22 16:00 Mon	12/22 19:00 Mon	12/22 22:00 Mon	12/23 01:00 Tue	12/23 04:00 Tue	12/23 07:00 Tue	12/23 10:00 Tue	12/23 13:00 Tue	12/23 16:00 Tue	12/23 19:00 Tue	12/23 22:00 Tue	12/24 01:00 Wed	12/24 04:00 Wed	12/24 07:00 Wed	12/24 10:00 Wed	12/24 13:00 Wed	12/24 16:00 Wed	12/24 19:00 Wed	12/25 01:00 Thu	12/25 07:00 Thu
GFS-N/X							45				62				37				56		45
NAM-N/X							41				54				36				53		42
GFS-TMP	43	49	47	46	46	47	49	54	59	59	53	49	46	42	38	41	52	56	51	48	48
NAM-TMP	50	54	49	41	42	44	45	45	50	52	49	45	42	39	37	40	48	52	47	46	45
GFS-DPT	12	16	25	35	39	43	46	49	51	50	48	44	40	36	31	28	29	31	35	43	46
NAM-DPT	19	21	26	28	31	35	37	41	45	46	46	42	40	37	34	35	37	37	37	38	40
GFS-CLD	OV	BK	OV	OV	OV	OV	OV	OV	BK	OV	SC	CL	CL	CL	CL	CL	CL	SC	OV	OV	OV
NAM-CLD	OV	BK	OV	OV	OV	OV	OV	OV	OV	OV	OV	BK	OV	OV	BK	BK	BK	BK	OV	OV	OV
GFS-WDR	13	13	14	18	20	21	22	23	25	26	28	31	34	01	04	08	12	12	12	21	28
NAM-WDR	13	14	17	18	19	21	22	22	24	24	26	26	32	36	03	07	09	09	13	17	28
GFS-WSP	09	09	08	09	11	12	13	13	13	10	07	06	06	07	06	07	07	07	07	08	08
NAM-WSP	07	08	07	07	09	09	08	08	08	08	05	04	04	06	05	05	06	06	06	06	05
GFS-P06			0		40		31		2		4		5		0		0		0	34	41
NAM-P06			0		16		40		29		11		11		0		1		3	15	14
GFS-P12							42				9				5				0		51
NAM-P12							40				29				18				12		29
GFS-Q06			0		0		0		0		0		0		0		0		0	0	1
NAM-Q06			0		0		0		0		0		0		0		0		0	0	0
GFS-Q12							0				0				0				0		1
NAM-Q12							0				0				0				0		0
GFS-T06			0/ 0		0/ 4		0/ 0		0/ 0		1/ 0		1/ 7		0/ 2		0/ 0		0/ 0		7/ 0
NAM-T06			0/ 0		0/ 7		0/ 0		0/ 2		0/ 0		0/ 2		0/ 3		0/ 3		0/ 0		0/ 0
GFS-T12					0/10				1/ 0				1/13				0/ 4			6/ 8
NAM-T12					0/ 7				0/ 2				0/ 2				0/ 3			0/ 7
GFS-POZ	3	6	4	4	1	1	1	1	1	1	3	3	2	1	3	2	3	2	3	2	0
NAM-POZ	11	9	6	7	2	0	1	1	1	2	2	2	2	4	7	8	6	5	4	2	1
GFS-POS	37	9	11	0	1	0	0	0	0	1	0	0	0	7	11	0	0	1	1	2	5
NAM-POS	14	21	4	3	0	1	1	1	1	0	1	0	1	7	7	6	6	2	1	1	7
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						0
NAM-SNW							0								0						0
GFS-CIG	8	8	6	6	5	6	5	7	4	8	8	8	8	8	8	8	8	8	6	3	2
NAM-CIG	8	8	8	6	5	5	5	5	4	5	5	8	7	7	8	7	8	8	4	2	2
GFS-VIS	7	7	7	7	7	7	7	5	7	7	7	7	7	7	7	7	7	7	7	5	3
NAM-VIS	7	7	7	7	7	5	7	7	6	7	7	1	1	1	5	5	7	7	7	2	3
GFS-OBV	N	N	N	N	N	N	N	BR	N	N	N	N	N	N	N	N	N	N	N	N	BR
NAM-OBV	N	N	N	N	N	N	N	N	HZ	N	N	FG	FG	FG	BR	FG	N	N	HZ	BR	BR

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.

8,566 Views