KD4PYR MOS Compare

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GFS and NAM MOS Compare

KCVG GFS MOS GUIDANCE 12/03/2025 0000 UTC
KCVG NAM MOS GUIDANCE 12/03/2025 0000 UTC

Date/Time UTC	12/3 06:00 Wed	12/3 09:00 Wed	12/3 12:00 Wed	12/3 15:00 Wed	12/3 18:00 Wed	12/3 21:00 Wed	12/4 00:00 Thu	12/4 03:00 Thu	12/4 06:00 Thu	12/4 09:00 Thu	12/4 12:00 Thu	12/4 15:00 Thu	12/4 18:00 Thu	12/4 21:00 Thu	12/5 00:00 Fri	12/5 03:00 Fri	12/5 06:00 Fri	12/5 09:00 Fri	12/5 12:00 Fri	12/5 18:00 Fri	12/6 00:00 Sat
Date/Time Local	12/3 01:00 Wed	12/3 04:00 Wed	12/3 07:00 Wed	12/3 10:00 Wed	12/3 13:00 Wed	12/3 16:00 Wed	12/3 19:00 Wed	12/3 22:00 Wed	12/4 01:00 Thu	12/4 04:00 Thu	12/4 07:00 Thu	12/4 10:00 Thu	12/4 13:00 Thu	12/4 16:00 Thu	12/4 19:00 Thu	12/4 22:00 Thu	12/5 01:00 Fri	12/5 04:00 Fri	12/5 07:00 Fri	12/5 13:00 Fri	12/5 19:00 Fri
GFS-X/N							31				24				31				18		37
NAM-X/N							38				27				35				21		42
GFS-TMP	22	21	21	21	27	31	27	28	28	27	26	26	29	30	22	18	19	19	20	34	29
NAM-TMP	25	24	23	27	33	37	33	33	32	31	29	29	32	32	28	25	24	24	25	39	37
GFS-DPT	20	19	18	20	21	20	21	21	22	23	22	25	23	20	16	13	13	15	16	23	23
NAM-DPT	20	19	18	20	21	21	22	22	23	24	24	21	19	17	16	14	16	17	19	23	25
GFS-CLD	OV	OV	OV	OV	BK	FW	BK	OV	OV	OV	OV	OV	OV	BK	BK	OV	BK	BK	OV	BK	OV
NAM-CLD	OV	OV	OV	OV	BK	BK	BK	OV	OV	OV	OV	OV	FW	CL	CL	SC	BK	BK	BK	BK	OV
GFS-WDR	23	22	19	20	22	20	21	24	25	29	32	35	01	03	03	07	08	08	12	21	18
NAM-WDR	25	22	20	21	21	21	21	25	25	28	32	35	35	01	05	07	09	14	17	22	20
GFS-WSP	02	03	03	06	08	07	05	04	04	05	06	09	08	07	07	06	05	03	03	05	04
NAM-WSP	02	04	05	08	09	08	06	06	06	06	09	10	07	05	05	04	04	04	03	07	06
GFS-P06			0		0		0		0		31		9		3		0		3	5	5
NAM-P06			1		4		5		14		40		20		4		5		7	7	7
GFS-P12							0				31				9				3		10
NAM-P12							5				40				21				7		8
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/ 3		0/ 0		0/ 5		0/ 6		0/ 5		0/ 1		0/ 0		0/ 5		0/ 0		0/ 0
NAM-T06			0/ 1		0/ 0		0/ 1		1/ 4		0/ 2		0/ 2		0/ 2		0/ 6		0/ 0		0/ 3
GFS-T12					0/ 6				0/ 7				0/ 5				0/ 5			0/ 2
NAM-T12					0/ 1				1/ 4				0/ 2				0/ 6			0/ 0
GFS-POZ	3	0	2	1	0	1	0	1	0	1	1	0	0	0	0	0	2	2	3	2	7
NAM-POZ	3	2	6	0	1	4	7	8	6	5	1	0	0	1	1	1	2	1	1	1	9
GFS-POS	94	99	98	99	00	98	90	97	97	98	99	99	98	99	99	98	98	95	94	85	75
NAM-POS	94	96	94	99	99	94	91	92	94	95	99	98	98	97	97	96	96	96	95	85	71
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
GFS-CIG	4	4	8	5	8	8	8	7	7	5	4	4	5	8	8	8	8	8	6	8	7
NAM-CIG	5	4	5	4	8	8	8	7	6	4	4	7	8	8	8	8	8	8	8	8	6
GFS-VIS	7	6	5	7	7	7	7	7	7	5	5	7	7	7	7	7	7	7	7	7	7
NAM-VIS	6	6	7	7	7	7	7	7	7	5	7	7	7	7	7	7	7	7	7	7	7
GFS-OBV	N	HZ	BR	N	N	N	N	N	N	N	BR	N	N	N	N	N	N	N	N	N	N
NAM-OBV	BR	BR	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.

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