KD4PYR MOS Compare

GFS and NAM MOS Compare

KCVG GFS MOS GUIDANCE 5/06/2025 1800 UTC
KCVG NAM MOS GUIDANCE 5/06/2025 1200 UTC

Date/Time UTC	5/6 18:00 Tue	5/6 21:00 Tue	5/7 00:00 Wed	5/7 03:00 Wed	5/7 06:00 Wed	5/7 09:00 Wed	5/7 12:00 Wed	5/7 15:00 Wed	5/7 18:00 Wed	5/7 21:00 Wed	5/8 00:00 Thu	5/8 03:00 Thu	5/8 06:00 Thu	5/8 09:00 Thu	5/8 12:00 Thu	5/8 15:00 Thu	5/8 18:00 Thu	5/8 21:00 Thu	5/9 00:00 Fri	5/9 03:00 Fri	5/9 06:00 Fri	5/9 12:00 Fri	5/9 18:00 Fri
Date/Time Local	5/6 14:00 Tue	5/6 17:00 Tue	5/6 20:00 Tue	5/6 23:00 Tue	5/7 02:00 Wed	5/7 05:00 Wed	5/7 08:00 Wed	5/7 11:00 Wed	5/7 14:00 Wed	5/7 17:00 Wed	5/7 20:00 Wed	5/7 23:00 Wed	5/8 02:00 Thu	5/8 05:00 Thu	5/8 08:00 Thu	5/8 11:00 Thu	5/8 14:00 Thu	5/8 17:00 Thu	5/8 20:00 Thu	5/8 23:00 Thu	5/9 02:00 Fri	5/9 08:00 Fri	5/9 14:00 Fri
GFS-N/X	--	--					52				75				56				70			48
NAM-N/X							52				75				54				64	--		47	--
GFS-TMP	--	--	64	59	56	54	56	65	71	73	69	64	61	59	59	65	67	67	64	57	53	50	65
NAM-TMP	64	66	64	58	57	55	56	67	72	73	69	62	59	57	55	56	60	62	57	--	51	49	--
GFS-DPT	--	--	50	49	48	48	49	51	51	51	51	52	51	51	51	53	54	52	49	47	44	42	39
NAM-DPT	51	51	52	51	51	50	51	54	53	54	55	56	55	53	52	51	50	49	46	--	43	42	--
GFS-CLD	--	--	BK	FW	FW	CL	CL	SC	SC	BK	BK	BK	OV	OV	OV	OV	OV	OV	OV	OV	BK	CL	FW
NAM-CLD	OV	BK	BK	SC	CL	FW	SC	SC	SC	BK	BK	OV	OV	OV	OV	OV	OV	OV	OV	--	OV	BK	--
GFS-WDR	--	--	25	23	24	25	29	29	02	22	19	20	23	35	05	04	03	02	02	03	03	02	02
NAM-WDR	26	26	26	25	24	23	25	30	27	30	32	18	24	05	03	03	02	02	03	--	03	04	--
GFS-WSP	--	--	06	05	05	02	02	05	04	04	04	02	02	02	04	05	08	13	17	13	12	10	13
NAM-WSP	12	11	07	05	04	04	03	04	05	05	04	02	02	03	06	06	09	10	12	--	12	09	--
GFS-P06	--	--			2		0		0		16		22		37		55		47		15	5	1
NAM-P06			2		0		2		2		5		14		37		45		33	--	14	1	--
GFS-P12	--	--					2				16				40				76			15
NAM-P12							4				6				40				57	--		14	--
GFS-Q06	--	--			0		0		0		0		0		1		1		1		0	0	0
NAM-Q06			0		0		0		0		0		0		0		1		0	--	0	0	--
GFS-Q12	--	--					0				0				0				2			0
NAM-Q12							0				0				0				1	--		0	--
GFS-T06	--	--			0/ 0		1/ 0		0/ 0		13/ 0		11/ 0		15/ 1		19/ 0		30/ 3		7/ 0		0/ 1
NAM-T06			2/ 2		1/ 0		0/ 0		1/ 0		5/ 4		9/ 1		23/ 0		18/ 0		21/ 5	--		3/ 0	--
GFS-T12	--	--							1/ 0				20/ 3				34/ 1				32/ 3		2/ 1
NAM-T12					2/ 3				1/ 1				14/ 4				40/ 1			--	24/ 5		--
GFS-POZ	--	--	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	1
NAM-POZ	0	0	0	0	1	0	0	0	0	0	0	0	0	0	0	0	0	0	0	--	0	0	--
GFS-POS	--	--	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	1	1	0	0
NAM-POS	0	0	0	0	0	0	0	0	0	0	0	1	1	1	1	1	1	1	1	--	0	3	--
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					--		0	--
GFS-CIG	--	--	8	8	8	8	8	8	8	7	8	8	8	7	6	4	5	6	6	6	8	8	8
NAM-CIG	6	6	8	8	8	8	8	8	8	7	7	7	7	6	5	4	5	5	6	--	4	4	--
GFS-VIS	--	--	7	7	7	7	7	7	7	7	7	7	2	2	1	6	7	7	7	7	7	7	7
NAM-VIS	7	7	7	7	7	7	7	7	7	7	7	7	7	5	5	5	7	7	7	--	7	7	--
GFS-OBV	--	--	N	N	N	N	N	N	N	N	N	N	BR	BR	FG	N	N	N	N	N	N	N	N
NAM-OBV	N	N	N	N	N	N	N	N	N	N	N	N	HZ	BR	BR	HZ	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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