KD4PYR MOS Compare

GFS and NAM MOS Compare

KCVG GFS MOS GUIDANCE 1/29/2026 1800 UTC
KCVG NAM MOS GUIDANCE 1/29/2026 1200 UTC

Date/Time UTC	1/29 18:00 Thu	1/29 21:00 Thu	1/30 00:00 Fri	1/30 03:00 Fri	1/30 06:00 Fri	1/30 09:00 Fri	1/30 12:00 Fri	1/30 15:00 Fri	1/30 18:00 Fri	1/30 21:00 Fri	1/31 00:00 Sat	1/31 03:00 Sat	1/31 06:00 Sat	1/31 09:00 Sat	1/31 12:00 Sat	1/31 15:00 Sat	1/31 18:00 Sat	1/31 21:00 Sat	2/1 00:00 Sun	2/1 03:00 Sun	2/1 06:00 Sun	2/1 12:00 Sun	2/1 18:00 Sun
Date/Time Local	1/29 13:00 Thu	1/29 16:00 Thu	1/29 19:00 Thu	1/29 22:00 Thu	1/30 01:00 Fri	1/30 04:00 Fri	1/30 07:00 Fri	1/30 10:00 Fri	1/30 13:00 Fri	1/30 16:00 Fri	1/30 19:00 Fri	1/30 22:00 Fri	1/31 01:00 Sat	1/31 04:00 Sat	1/31 07:00 Sat	1/31 10:00 Sat	1/31 13:00 Sat	1/31 16:00 Sat	1/31 19:00 Sat	1/31 22:00 Sat	2/1 01:00 Sun	2/1 07:00 Sun	2/1 13:00 Sun
GFS-N/X	--	--					11				19				4				12			5
NAM-N/X							8				22				5				16	--		8	--
GFS-TMP	--	--	19	17	15	14	13	12	16	17	14	11	8	7	7	4	9	11	9	8	7	7	18
NAM-TMP	21	24	20	15	13	11	10	15	19	20	19	17	13	9	6	8	13	15	15	--	12	10	--
GFS-DPT	--	--	3	5	7	7	7	7	9	9	7	5	4	3	2	1	2	4	4	4	4	3	6
NAM-DPT	4	4	4	6	6	5	5	7	9	9	8	9	5	1	-3	-2	0	1	3	--	5	3	--
GFS-CLD	--	--	OV	OV	OV	BK	BK	BK	OV	OV	OV	OV	OV	BK	OV	OV	OV	OV	OV	OV	OV	SC	FW
NAM-CLD	SC	SC	BK	FW	CL	FW	BK	BK	BK	OV	OV	OV	OV	OV	BK	OV	OV	OV	OV	--	BK	FW	--
GFS-WDR	--	--	36	03	03	04	05	06	05	03	02	02	01	01	36	35	35	35	33	32	32	32	30
NAM-WDR	21	24	36	03	01	01	02	04	04	01	01	36	36	36	34	33	34	34	34	--	31	32	--
GFS-WSP	--	--	04	04	05	05	06	08	08	10	09	09	08	07	07	09	11	13	10	06	07	04	07
NAM-WSP	03	03	03	03	02	02	02	04	07	09	09	10	09	06	05	06	08	09	06	--	05	05	--
GFS-P06	--	--			2		6		3		1		3		3		2		6		2	0	0
NAM-P06			0		0		1		4		4		4		1		6		2	--	0	0	--
GFS-P12	--	--					6				3				3				6			5
NAM-P12							1				4				4				7	--		0	--
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/ 4		0/ 0		0/ 1		0/ 0		0/ 3		0/ 0		0/ 0		0/ 0		0/ 1		0/ 2
NAM-T06			0/ 6		0/ 6		0/ 0		0/ 2		0/ 1		0/ 2		0/ 0		0/ 2		0/ 2	--		0/ 5	--
GFS-T12	--	--							0/ 3				0/ 9				0/ 0				0/ 2		0/ 5
NAM-T12					0/ 7				0/ 2				0/ 2				1/ 2			--	0/ 5		--
GFS-POZ	--	--	4	3	4	1	4	1	2	2	4	4	1	1	2	1	1	1	2	2	1	2	0
NAM-POZ	3	2	3	2	2	0	1	1	3	4	3	4	1	1	1	2	2	3	3	--	3	2	--
GFS-POS	--	--	92	96	97	99	96	99	98	98	96	97	99	99	98	99	99	99	98	98	96	98	00
NAM-POS	96	98	97	98	98	00	99	99	96	96	97	96	98	98	99	99	98	96	97	--	94	98	--
GFS-TYP	--	--	S	S	S	S	S	S	S	S	S	S	S	S	S	S	S	S	S	S	S	S	S
NAM-TYP	S	S	S	S	S	S	S	S	S	S	S	S	S	S	S	S	S	S	S	--	S	S	--
GFS-SNW	--	--													0							0
NAM-SNW							0								0					--		0	--
GFS-CIG	--	--	7	7	7	8	8	8	6	5	7	8	8	8	8	4	4	5	6	5	4	8	8
NAM-CIG	8	8	8	8	8	8	8	8	5	5	6	6	6	7	8	6	5	5	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	7	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.

8,658 Views