KD4PYR MOS Compare

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GFS and NAM MOS Compare

KCVG GFS MOS GUIDANCE 11/19/2025 0000 UTC
KCVG NAM MOS GUIDANCE 11/19/2025 0000 UTC

Date/Time UTC	11/19 06:00 Wed	11/19 09:00 Wed	11/19 12:00 Wed	11/19 15:00 Wed	11/19 18:00 Wed	11/19 21:00 Wed	11/20 00:00 Thu	11/20 03:00 Thu	11/20 06:00 Thu	11/20 09:00 Thu	11/20 12:00 Thu	11/20 15:00 Thu	11/20 18:00 Thu	11/20 21:00 Thu	11/21 00:00 Fri	11/21 03:00 Fri	11/21 06:00 Fri	11/21 09:00 Fri	11/21 12:00 Fri	11/21 18:00 Fri	11/22 00:00 Sat
Date/Time Local	11/19 01:00 Wed	11/19 04:00 Wed	11/19 07:00 Wed	11/19 10:00 Wed	11/19 13:00 Wed	11/19 16:00 Wed	11/19 19:00 Wed	11/19 22:00 Wed	11/20 01:00 Thu	11/20 04:00 Thu	11/20 07:00 Thu	11/20 10:00 Thu	11/20 13:00 Thu	11/20 16:00 Thu	11/20 19:00 Thu	11/20 22:00 Thu	11/21 01:00 Fri	11/21 04:00 Fri	11/21 07:00 Fri	11/21 13:00 Fri	11/21 19:00 Fri
GFS-X/N							54				43				59				52		64
NAM-X/N							47				37				53				40		54
GFS-TMP	47	45	44	47	51	52	48	47	45	44	45	50	57	59	55	54	54	54	54	61	60
NAM-TMP	43	42	41	41	43	45	42	42	41	39	39	46	49	50	48	44	44	43	42	50	47
GFS-DPT	42	41	40	42	44	44	44	44	43	43	43	46	47	47	49	49	50	51	53	57	58
NAM-DPT	41	40	39	39	41	42	42	39	39	39	38	40	43	44	44	41	42	42	42	46	44
GFS-CLD	OV	OV	OV	OV	OV	OV	OV	OV	OV	OV	OV	BK	OV	OV	OV	OV	OV	OV	OV	OV	OV
NAM-CLD	OV	OV	OV	OV	OV	OV	OV	OV	OV	OV	OV	OV	OV	OV	OV	OV	OV	OV	OV	OV	OV
GFS-WDR	36	02	03	05	05	07	08	07	10	15	23	20	18	18	17	18	17	18	18	17	23
NAM-WDR	02	02	04	05	05	04	06	07	35	27	20	25	22	21	15	09	07	05	06	03	02
GFS-WSP	07	07	07	07	05	04	03	03	02	02	03	03	05	05	04	04	04	04	05	08	11
NAM-WSP	06	06	06	08	06	04	04	01	02	02	01	03	04	04	04	03	03	03	04	07	10
GFS-P06			4		1		0		0		0		3		7		23		62	72	88
NAM-P06			4		0		2		8		4		3		18		37		83	83	80
GFS-P12							1				0				8				62		95
NAM-P12							17				25				23				83		94
GFS-Q06			0		0		0		0		0		0		0		0		1	2	3
NAM-Q06			0		0		0		0		0		0		0		0		2	3	3
GFS-Q12							0				0				0				1		3
NAM-Q12							0				0				0				2		4
GFS-T06			1/ 0		0/ 0		0/ 0		0/ 2		0/ 3		0/ 0		1/ 0		2/ 0		7/ 0		2/18
NAM-T06			0/ 3		0/ 0		0/11		0/ 6		0/ 1		0/ 0		1/ 2		1/ 1		1/ 0		2/15
GFS-T12					1/ 4				1/15				1/ 5				2/12			7/ 3
NAM-T12					0/ 3				0/11				0/ 1				2/ 2			6/ 1
GFS-POZ	0	0	0	0	0	0	0	1	0	0	0	0	0	0	0	1	0	0	0	0	1
NAM-POZ	0	1	0	0	0	0	0	0	0	0	0	0	0	0	0	0	1	0	0	0	1
GFS-POS	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0
NAM-POS	0	0	1	0	0	0	0	0	0	0	0	0	0	1	1	1	0	0	1	0	1
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	2	2	2	3	5	5	6	6	7	8	8	7	8	7	7	6	4	2	2	2	4
NAM-CIG	1	2	2	2	4	5	5	5	5	4	4	4	4	5	7	6	5	2	2	2	2
GFS-VIS	1	1	1	1	7	7	7	7	7	7	7	7	7	7	7	7	5	3	4	3	5
NAM-VIS	1	1	1	1	5	7	7	7	1	1	1	5	7	7	7	7	5	3	3	3	3
GFS-OBV	FG	FG	FG	FG	N	N	N	N	N	N	HZ	N	N	N	N	N	BR	BR	BR	BR	HZ
NAM-OBV	FG	FG	FG	FG	BR	HZ	HZ	BR	FG	FG	FG	BR	HZ	N	N	N	BR	BR	BR	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.

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