KD4PYR MOS Compare

GFS and NAM MOS Compare

KCVG GFS MOS GUIDANCE 1/19/2020 1200 UTC
KCVG NAM MOS GUIDANCE 1/19/2020 1200 UTC

Date/Time UTC	1/19 18:00 Sun	1/19 21:00 Sun	1/20 00:00 Mon	1/20 03:00 Mon	1/20 06:00 Mon	1/20 09:00 Mon	1/20 12:00 Mon	1/20 15:00 Mon	1/20 18:00 Mon	1/20 21:00 Mon	1/21 00:00 Tue	1/21 03:00 Tue	1/21 06:00 Tue	1/21 09:00 Tue	1/21 12:00 Tue	1/21 15:00 Tue	1/21 18:00 Tue	1/21 21:00 Tue	1/22 00:00 Wed	1/22 06:00 Wed	1/22 12:00 Wed
Date/Time Local	1/19 13:00 Sun	1/19 16:00 Sun	1/19 19:00 Sun	1/19 22:00 Sun	1/20 01:00 Mon	1/20 04:00 Mon	1/20 07:00 Mon	1/20 10:00 Mon	1/20 13:00 Mon	1/20 16:00 Mon	1/20 19:00 Mon	1/20 22:00 Mon	1/21 01:00 Tue	1/21 04:00 Tue	1/21 07:00 Tue	1/21 10:00 Tue	1/21 13:00 Tue	1/21 16:00 Tue	1/21 19:00 Tue	1/22 01:00 Wed	1/22 07:00 Wed
GFS-N/X							13				31				15				32		16
NAM-N/X							13				32				14				32		18
GFS-TMP	20	20	19	18	15	15	16	22	27	28	24	21	19	18	17	24	29	31	25	21	18
NAM-TMP	20	19	16	14	14	15	16	22	28	30	24	19	17	17	16	23	29	31	27	23	19
GFS-DPT	7	7	9	9	7	8	10	13	12	11	10	10	9	9	10	13	13	12	13	11	10
NAM-DPT	5	2	2	2	5	9	11	13	10	7	5	6	7	8	9	13	13	13	13	14	13
GFS-CLD	BK	SC	FW	BK	OV	OV	BK	SC	FW	SC	BK	BK	FW	CL	CL	CL	CL	CL	CL	CL	CL
NAM-CLD	BK	SC	BK	OV	OV	OV	OV	BK	SC	SC	SC	SC	FW	CL	SC	BK	CL	CL	CL	CL	FW
GFS-WDR	29	30	30	31	32	32	33	34	36	35	35	01	01	36	01	04	04	05	10	14	15
NAM-WDR	29	30	31	31	31	32	32	33	33	34	36	36	36	36	36	36	32	27	21	17	16
GFS-WSP	15	13	11	10	08	06	04	06	06	06	05	04	04	04	02	04	04	03	02	03	03
NAM-WSP	13	13	11	10	09	06	05	06	06	08	05	06	05	05	04	05	05	04	02	02	02
GFS-P06			0		0		1		1		1		1		1		0		0	0	3
NAM-P06			0		0		0		1		0		0		0		0		0	0	0
GFS-P12							1				1				1				0		3
NAM-P12							0				1				0				0		0
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/ 4		0/ 4		0/ 1		0/ 1		0/ 0		0/ 0		0/ 0		0/ 2		0/ 0		0/ 3
NAM-T06			0/ 7		0/ 3		0/ 0		0/ 1		0/ 0		0/ 0		0/ 3		0/ 0		0/ 0		0/ 0
GFS-T12					0/11				0/ 1				0/12				0/ 4			0/11
NAM-T12					0/ 7				0/ 1				0/ 0				0/ 3			0/ 7
GFS-POZ	2	1	3	1	2	1	1	1	2	2	2	2	2	0	1	1	1	0	0	0	6
NAM-POZ	0	2	3	2	2	1	1	1	2	2	2	2	1	1	1	2	2	2	3	3	6
GFS-POS	92	99	95	99	98	00	99	99	98	99	98	98	99	99	99	98	99	93	97	98	85
NAM-POS	00	99	97	98	98	99	98	99	97	98	97	98	98	98	99	98	98	96	97	94	91
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						0
NAM-SNW							0								0						0
GFS-CIG	6	8	8	8	6	6	8	8	8	8	8	8	8	8	8	8	8	8	8	8	8
NAM-CIG	6	8	8	6	6	6	8	8	8	8	8	8	8	8	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	7	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	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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