KD4PYR MOS Compare

GFS and NAM MOS Compare

KCVG GFS MOS GUIDANCE 11/26/2020 1200 UTC
KCVG NAM MOS GUIDANCE 11/26/2020 1200 UTC

Date/Time UTC	11/26 18:00 Thu	11/26 21:00 Thu	11/27 00:00 Fri	11/27 03:00 Fri	11/27 06:00 Fri	11/27 09:00 Fri	11/27 12:00 Fri	11/27 15:00 Fri	11/27 18:00 Fri	11/27 21:00 Fri	11/28 00:00 Sat	11/28 03:00 Sat	11/28 06:00 Sat	11/28 09:00 Sat	11/28 12:00 Sat	11/28 15:00 Sat	11/28 18:00 Sat	11/28 21:00 Sat	11/29 00:00 Sun	11/29 06:00 Sun	11/29 12:00 Sun
Date/Time Local	11/26 13:00 Thu	11/26 16:00 Thu	11/26 19:00 Thu	11/26 22:00 Thu	11/27 01:00 Fri	11/27 04:00 Fri	11/27 07:00 Fri	11/27 10:00 Fri	11/27 13:00 Fri	11/27 16:00 Fri	11/27 19:00 Fri	11/27 22:00 Fri	11/28 01:00 Sat	11/28 04:00 Sat	11/28 07:00 Sat	11/28 10:00 Sat	11/28 13:00 Sat	11/28 16:00 Sat	11/28 19:00 Sat	11/29 01:00 Sun	11/29 07:00 Sun
GFS-N/X							40				57				36				50		32
NAM-N/X							41				53				33				48		32
GFS-TMP	51	51	48	47	45	43	42	49	54	55	50	46	43	40	37	41	47	49	42	37	34
NAM-TMP	50	51	47	46	45	44	43	46	49	50	46	43	40	37	35	38	45	47	42	37	33
GFS-DPT	45	45	45	43	39	38	38	41	41	40	40	40	39	36	34	34	31	29	28	26	26
NAM-DPT	45	43	42	41	42	42	42	41	41	40	39	37	35	33	30	31	32	30	29	29	28
GFS-CLD	OV	OV	OV	OV	OV	OV	OV	OV	BK	OV	OV	OV	OV	FW	CL	CL	CL	CL	CL	CL	CL
NAM-CLD	OV	OV	OV	OV	OV	OV	OV	OV	BK	OV	OV	OV	OV	OV	BK	FW	SC	FW	CL	CL	SC
GFS-WDR	25	25	24	23	21	23	22	21	21	24	30	31	31	32	33	33	30	27	20	20	15
NAM-WDR	26	25	25	23	21	25	25	24	23	27	32	34	33	34	34	34	35	25	10	11	12
GFS-WSP	08	06	03	01	02	02	02	05	06	05	05	05	06	06	05	05	04	03	01	01	02
NAM-WSP	06	05	03	02	02	02	03	05	05	05	05	04	07	08	06	06	04	03	03	02	03
GFS-P06			2		1		0		0		0		12		3		0		0	3	5
NAM-P06			0		0		11		5		4		4		1		0		1	3	7
GFS-P12							1				1				12				1		5
NAM-P12							11				5				4				1		7
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			1/ 1		0/ 0		0/ 6		0/ 0		1/ 0		0/ 1		0/ 6		0/ 1		0/ 0		0/ 0
NAM-T06			0/ 0		0/ 0		0/ 4		0/ 1		0/ 7		0/ 4		0/ 0		0/ 0		0/ 0		0/ 0
GFS-T12					1/ 4				0/ 6				1/10				0/ 6			0/ 8
NAM-T12					0/ 0				0/ 4				0/ 7				0/ 0			0/ 1
GFS-POZ	0	0	1	1	0	0	0	0	0	0	0	0	0	0	0	0	3	6	8	13	7
NAM-POZ	0	1	2	1	0	0	0	0	0	0	0	0	0	0	1	3	1	6	10	18	12
GFS-POS	0	0	0	0	1	1	0	0	0	0	3	2	6	11	19	10	3	2	0	15	17
NAM-POS	0	0	0	0	1	8	1	2	1	1	3	4	3	16	14	17	2	6	14	26	33
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						0
NAM-SNW							0								0						0
GFS-CIG	4	5	5	5	5	5	5	7	8	7	6	6	6	8	8	8	8	8	8	8	8
NAM-CIG	5	5	5	5	5	4	4	5	7	6	6	6	5	5	8	8	8	8	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	7	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	BR	BR	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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