KD4PYR MOS Compare

GFS and NAM MOS Compare

KCVG GFS MOS GUIDANCE 7/13/2025 0000 UTC
KCVG NAM MOS GUIDANCE 7/13/2025 0000 UTC

Date/Time UTC	7/13 06:00 Sun	7/13 09:00 Sun	7/13 12:00 Sun	7/13 15:00 Sun	7/13 18:00 Sun	7/13 21:00 Sun	7/14 00:00 Mon	7/14 03:00 Mon	7/14 06:00 Mon	7/14 09:00 Mon	7/14 12:00 Mon	7/14 15:00 Mon	7/14 18:00 Mon	7/14 21:00 Mon	7/15 00:00 Tue	7/15 03:00 Tue	7/15 06:00 Tue	7/15 09:00 Tue	7/15 12:00 Tue	7/15 18:00 Tue	7/16 00:00 Wed
Date/Time Local	7/13 02:00 Sun	7/13 05:00 Sun	7/13 08:00 Sun	7/13 11:00 Sun	7/13 14:00 Sun	7/13 17:00 Sun	7/13 20:00 Sun	7/13 23:00 Sun	7/14 02:00 Mon	7/14 05:00 Mon	7/14 08:00 Mon	7/14 11:00 Mon	7/14 14:00 Mon	7/14 17:00 Mon	7/14 20:00 Mon	7/14 23:00 Mon	7/15 02:00 Tue	7/15 05:00 Tue	7/15 08:00 Tue	7/15 14:00 Tue	7/15 20:00 Tue
GFS-X/N							89				71				88				71		89
NAM-X/N							87				71				86				71		88
GFS-TMP	71	70	73	81	86	87	83	77	75	73	74	79	84	86	82	77	74	72	75	86	83
NAM-TMP	70	69	70	77	83	84	79	76	74	73	73	78	82	83	80	75	74	73	74	85	82
GFS-DPT	69	69	70	71	68	67	67	68	69	69	69	70	71	70	70	70	69	69	71	71	69
NAM-DPT	70	69	70	71	72	71	71	71	71	71	71	71	72	73	73	72	72	71	72	73	73
GFS-CLD	OV	OV	OV	OV	BK	BK	BK	OV	OV	OV	OV	OV	OV	OV	BK	SC	BK	BK	BK	BK	BK
NAM-CLD	BK	OV	OV	OV	BK	BK	OV	OV	OV	OV	OV	OV	BK	OV	OV	OV	BK	BK	OV	BK	BK
GFS-WDR	22	24	27	26	25	25	29	30	01	11	09	28	28	29	34	03	06	05	06	23	23
NAM-WDR	23	21	23	24	24	26	27	25	28	25	23	25	26	25	22	20	19	16	20	20	19
GFS-WSP	04	03	03	04	07	07	06	05	03	03	02	03	05	06	06	04	04	03	02	04	04
NAM-WSP	04	04	03	03	05	06	04	03	03	03	03	04	05	05	03	02	01	01	02	05	04
GFS-P06			25		6		27		57		52		33		43		11		9	9	27
NAM-P06			33		14		10		53		72		48		32		4		16	38	35
GFS-P12							37				81				72				21		27
NAM-P12							19				88				64				16		53
GFS-Q06			0		0		0		2		1		0		1		0		0	0	0
NAM-Q06			0		0		0		2		3		1		0		0		0	1	0
GFS-Q12							0				3				3				0		0
NAM-Q12							0				4				2				0		2
GFS-T06			11/ 1		9/ 6		36/19		25/ 7		24/ 3		20/ 3		45/11		9/ 2		2/ 2		31/15
NAM-T06			10/ 2		10/ 5		19/17		30/11		27/ 4		26/ 5		46/19		11/ 6		7/ 2		47/22
GFS-T12					16/ 6				60/19				37/ 4				48/13			7/ 6
NAM-T12					20/ 5				45/17				42/ 5				52/19			33/ 7
GFS-CIG	8	4	2	5	6	8	8	7	6	6	3	4	6	6	8	8	8	8	7	6	8
NAM-CIG	8	5	2	4	6	8	8	6	6	5	3	4	5	6	6	6	8	7	6	6	8
GFS-VIS	7	7	5	7	7	7	7	6	2	3	1	7	7	7	7	7	5	1	1	7	7
NAM-VIS	7	5	5	6	7	7	7	7	4	4	4	5	7	7	7	7	3	2	3	7	7
GFS-OBV	N	N	BR	N	N	N	N	HZ	BR	BR	FG	N	N	N	N	N	BR	FG	FG	N	N
NAM-OBV	N	BR	BR	HZ	N	N	N	N	BR	BR	BR	BR	N	N	N	N	BR	FG	BR	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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