KD4PYR MOS Compare

GFS and NAM MOS Compare

KCVG GFS MOS GUIDANCE 3/26/2023 1200 UTC
KCVG NAM MOS GUIDANCE 3/26/2023 1200 UTC

Date/Time UTC	3/26 18:00 Sun	3/26 21:00 Sun	3/27 00:00 Mon	3/27 03:00 Mon	3/27 06:00 Mon	3/27 09:00 Mon	3/27 12:00 Mon	3/27 15:00 Mon	3/27 18:00 Mon	3/27 21:00 Mon	3/28 00:00 Tue	3/28 03:00 Tue	3/28 06:00 Tue	3/28 09:00 Tue	3/28 12:00 Tue	3/28 15:00 Tue	3/28 18:00 Tue	3/28 21:00 Tue	3/29 00:00 Wed	3/29 06:00 Wed	3/29 12:00 Wed
Date/Time Local	3/26 14:00 Sun	3/26 17:00 Sun	3/26 20:00 Sun	3/26 23:00 Sun	3/27 02:00 Mon	3/27 05:00 Mon	3/27 08:00 Mon	3/27 11:00 Mon	3/27 14:00 Mon	3/27 17:00 Mon	3/27 20:00 Mon	3/27 23:00 Mon	3/28 02:00 Tue	3/28 05:00 Tue	3/28 08:00 Tue	3/28 11:00 Tue	3/28 14:00 Tue	3/28 17:00 Tue	3/28 20:00 Tue	3/29 02:00 Wed	3/29 08:00 Wed
GFS-N/X							43				57				33				52		32
NAM-N/X							42				52				33				47		29
GFS-TMP	59	60	55	51	49	47	45	50	53	52	47	40	37	35	35	44	49	49	44	37	34
NAM-TMP	58	61	55	46	46	45	45	48	49	48	43	39	38	36	34	40	44	46	41	33	31
GFS-DPT	39	39	41	42	41	41	41	41	38	35	33	32	31	29	29	32	31	31	31	32	30
NAM-DPT	35	34	35	36	39	41	43	45	43	40	37	35	35	34	32	31	28	26	25	27	26
GFS-CLD	CL	SC	BK	OV	OV	OV	OV	OV	OV	OV	OV	OV	BK	OV	SC	BK	OV	OV	OV	CL	CL
NAM-CLD	FW	FW	SC	OV	OV	OV	OV	OV	OV	OV	OV	OV	OV	OV	OV	OV	OV	OV	BK	CL	FW
GFS-WDR	16	18	12	12	02	33	30	30	31	32	35	01	03	04	06	07	35	35	34	33	23
NAM-WDR	15	15	12	13	16	36	34	36	30	33	35	36	01	02	03	03	34	32	33	23	21
GFS-WSP	06	05	04	05	06	06	09	09	13	10	09	06	06	05	06	06	07	08	07	04	02
NAM-WSP	07	06	05	06	04	05	06	05	08	09	11	09	07	05	07	06	07	07	05	02	03
GFS-P06			0		12		76		27		1		2		4		7		30	4	0
NAM-P06			0		1		82		54		6		5		7		8		6	0	2
GFS-P12							76				31				4				30		9
NAM-P12							82				67				7				8		2
GFS-Q06			0		0		2		0		0		0		0		0		0	0	0
NAM-Q06			0		0		2		1		0		0		0		0		0	0	0
GFS-Q12							2				0				0				0		0
NAM-Q12							1				1				0				0		0
GFS-T06			0/19		4/12		6/ 6		1/ 0		0/16		0/ 1		0/ 2		1/ 1		4/ 3		0/ 1
NAM-T06			0/15		0/15		3/ 6		2/ 1		0/12		0/ 8		1/ 1		1/ 0		0/ 5		0/ 1
GFS-T12					4/19				11/ 7				0/16				1/ 2			4/10
NAM-T12					1/17				3/ 8				0/19				1/ 1			0/ 5
GFS-POZ	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0
NAM-POZ	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0
GFS-POS	0	0	0	0	1	2	6	3	4	8	15	24	18	19	38	23	25	19	17	40	47
NAM-POS	0	0	1	2	2	1	1	2	4	5	6	16	35	40	51	51	43	35	44	64	59
GFS-TYP	R	R	R	R	R	R	R	R	R	R	R	R	R	R	R	R	R	R	R	R	S
NAM-TYP	R	R	R	R	R	R	R	R	R	R	R	R	R	R	S	S	R	R	R	S	S
GFS-SNW							0								0						0
NAM-SNW							0								0						0
GFS-CIG	8	8	8	8	7	6	5	5	6	6	6	6	6	7	8	8	6	6	6	8	8
NAM-CIG	8	8	8	8	8	6	3	4	5	5	5	5	4	4	5	6	6	7	8	8	8
GFS-VIS	7	7	7	7	7	7	7	7	7	7	7	7	7	7	7	7	7	7	7	7	7
NAM-VIS	7	7	7	7	7	7	5	5	7	7	7	7	7	7	7	7	7	7	7	7	7
GFS-OBV	N	N	N	N	N	N	N	N	N	N	N	N	N	N	N	N	N	N	N	N	N
NAM-OBV	N	N	N	N	N	N	N	BR	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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