KD4PYR MOS Compare

GFS and NAM MOS Compare

KCVG GFS MOS GUIDANCE 7/19/2025 1800 UTC
KCVG NAM MOS GUIDANCE 7/19/2025 1200 UTC

Date/Time UTC	7/19 18:00 Sat	7/19 21:00 Sat	7/20 00:00 Sun	7/20 03:00 Sun	7/20 06:00 Sun	7/20 09:00 Sun	7/20 12:00 Sun	7/20 15:00 Sun	7/20 18:00 Sun	7/20 21:00 Sun	7/21 00:00 Mon	7/21 03:00 Mon	7/21 06:00 Mon	7/21 09:00 Mon	7/21 12:00 Mon	7/21 15:00 Mon	7/21 18:00 Mon	7/21 21:00 Mon	7/22 00:00 Tue	7/22 03:00 Tue	7/22 06:00 Tue	7/22 12:00 Tue	7/22 18:00 Tue
Date/Time Local	7/19 14:00 Sat	7/19 17:00 Sat	7/19 20:00 Sat	7/19 23:00 Sat	7/20 02:00 Sun	7/20 05:00 Sun	7/20 08:00 Sun	7/20 11:00 Sun	7/20 14:00 Sun	7/20 17:00 Sun	7/20 20:00 Sun	7/20 23:00 Sun	7/21 02:00 Mon	7/21 05:00 Mon	7/21 08:00 Mon	7/21 11:00 Mon	7/21 14:00 Mon	7/21 17:00 Mon	7/21 20:00 Mon	7/21 23:00 Mon	7/22 02:00 Tue	7/22 08:00 Tue	7/22 14:00 Tue
GFS-N/X	--	--					73				89				71				84			68
NAM-N/X							73				87				73				84	--		68	--
GFS-TMP	--	--	77	75	75	74	76	84	86	83	79	76	75	73	73	77	80	81	77	74	72	70	85
NAM-TMP	81	80	77	75	74	74	75	79	82	83	81	77	75	74	74	75	79	81	77	--	71	70	--
GFS-DPT	--	--	74	73	74	73	74	75	73	73	72	71	69	69	69	70	71	70	69	68	67	66	64
NAM-DPT	72	72	71	70	70	71	71	75	76	77	77	75	75	74	73	70	71	70	69	--	68	66	--
GFS-CLD	--	--	OV	BK	BK	OV	BK	BK	OV	OV	OV	OV	OV	OV	OV	OV	OV	OV	OV	OV	OV	BK	SC
NAM-CLD	OV	OV	OV	OV	OV	OV	OV	OV	OV	OV	OV	OV	OV	OV	OV	OV	OV	BK	OV	--	BK	SC	--
GFS-WDR	--	--	24	24	24	24	24	26	27	28	33	02	05	06	08	09	08	06	03	05	05	06	05
NAM-WDR	21	24	22	21	23	23	23	25	26	30	30	32	27	02	10	11	26	06	06	--	08	08	--
GFS-WSP	--	--	06	07	05	04	04	07	08	07	06	04	04	05	06	07	08	08	07	06	06	04	06
NAM-WSP	06	09	06	06	07	06	05	06	04	06	05	04	02	04	05	04	05	06	06	--	04	04	--
GFS-P06	--	--			23		25		38		66		48		57		42		48		41	20	5
NAM-P06			83		14		15		20		25		50		75		65		32	--	19	7	--
GFS-P12	--	--					35				80				74				62			46
NAM-P12							28				30				83				66	--		21	--
GFS-Q06	--	--			0		0		1		3		1		2		1		1		1	0	0
NAM-Q06			3		0		0		0		0		1		5		4		0	--	0	0	--
GFS-Q12	--	--					0				3				3				2			1
NAM-Q12							0				0				5				4	--		0	--
GFS-T06	--	--			14/ 8		13/ 3		27/ 7		49/23		29/ 9		27/ 3		19/ 5		42/17		23/ 6		5/ 4
NAM-T06			50/22		5/ 9		12/ 6		12/ 8		29/31		34/17		32/ 5		28/ 6		34/18	--		5/ 2	--
GFS-T12	--	--							34/ 9				62/23				35/ 6				42/17		8/ 5
NAM-T12					51/22				20/ 8				58/31				41/ 6			--	43/18		--
GFS-CIG	--	--	7	7	7	6	6	7	7	7	7	7	6	3	3	4	5	6	7	7	7	8	8
NAM-CIG	5	5	5	7	6	5	4	4	4	5	7	7	6	3	3	3	4	5	7	--	8	8	--
GFS-VIS	--	--	7	7	7	7	5	7	7	7	7	6	3	4	4	7	7	7	7	7	7	5	7
NAM-VIS	7	7	7	6	7	7	6	6	7	7	7	7	5	4	4	3	5	7	7	--	7	5	--
GFS-OBV	--	--	N	N	N	N	BR	N	N	N	N	BR	BR	BR	BR	N	N	N	N	N	N	BR	N
NAM-OBV	N	N	N	BR	N	N	BR	HZ	N	N	N	HZ	BR	BR	BR	BR	HZ	N	N	--	N	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.

8,197 Views