KD4PYR MOS Compare

GFS and NAM MOS Compare

KCVG GFS MOS GUIDANCE 8/17/2019 1200 UTC
KCVG NAM MOS GUIDANCE 8/17/2019 1200 UTC

Date/Time UTC	8/17 18:00 Sat	8/17 21:00 Sat	8/18 00:00 Sun	8/18 03:00 Sun	8/18 06:00 Sun	8/18 09:00 Sun	8/18 12:00 Sun	8/18 15:00 Sun	8/18 18:00 Sun	8/18 21:00 Sun	8/19 00:00 Mon	8/19 03:00 Mon	8/19 06:00 Mon	8/19 09:00 Mon	8/19 12:00 Mon	8/19 15:00 Mon	8/19 18:00 Mon	8/19 21:00 Mon	8/20 00:00 Tue	8/20 06:00 Tue	8/20 12:00 Tue
Date/Time Local	8/17 14:00 Sat	8/17 17:00 Sat	8/17 20:00 Sat	8/17 23:00 Sat	8/18 02:00 Sun	8/18 05:00 Sun	8/18 08:00 Sun	8/18 11:00 Sun	8/18 14:00 Sun	8/18 17:00 Sun	8/18 20:00 Sun	8/18 23:00 Sun	8/19 02:00 Mon	8/19 05:00 Mon	8/19 08:00 Mon	8/19 11:00 Mon	8/19 14:00 Mon	8/19 17:00 Mon	8/19 20:00 Mon	8/20 02:00 Tue	8/20 08:00 Tue
GFS-N/X							69				90				69				88		69
NAM-N/X							71				92				70				90		69
GFS-TMP	85	84	80	75	72	71	72	81	87	87	82	76	73	72	72	81	85	85	80	73	72
NAM-TMP	85	87	82	77	75	73	74	83	88	89	83	77	74	73	73	81	86	87	83	74	73
GFS-DPT	69	69	70	69	68	68	68	70	70	69	70	69	69	69	69	71	71	71	72	72	72
NAM-DPT	68	68	69	67	67	67	68	70	69	68	68	69	69	69	70	71	71	71	71	72	72
GFS-CLD	BK	BK	BK	BK	SC	SC	SC	SC	SC	SC	BK	BK	BK	SC	SC	SC	BK	BK	BK	SC	BK
NAM-CLD	BK	BK	BK	SC	CL	FW	SC	FW	BK	BK	BK	BK	BK	BK	BK	SC	BK	BK	OV	BK	BK
GFS-WDR	26	16	17	19	20	19	19	22	21	21	19	20	20	19	19	22	21	21	22	21	20
NAM-WDR	23	17	20	19	19	19	18	21	23	23	19	21	22	09	16	20	21	23	26	18	14
GFS-WSP	07	06	05	05	06	05	05	07	09	09	05	05	05	05	05	06	07	08	04	03	02
NAM-WSP	06	07	04	04	05	04	04	06	10	09	06	05	05	04	03	03	04	06	04	03	02
GFS-P06			25		10		7		3		11		14		1		5		28	15	17
NAM-P06			3		2		5		4		4		19		35		7		32	29	13
GFS-P12							10				15				18				36		34
NAM-P12							5				5				46				35		47
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				1				0		1
GFS-T06			33/15		21/10		7/ 1		9/ 7		32/20		19/ 7		4/ 3		10/ 6		30/14		10/ 3
NAM-T06			16/18		12/12		4/ 6		9/13		21/31		23/16		27/ 5		9/ 6		36/18		11/ 4
GFS-T12					36/15				12/ 8				38/20				15/ 8			43/16
NAM-T12					17/18				17/13				32/31				29/ 8			49/18
GFS-CIG	8	8	8	8	8	8	8	8	8	8	8	8	8	8	8	8	8	8	8	8	8
NAM-CIG	7	8	8	8	8	8	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	6	4
NAM-VIS	7	7	7	7	7	7	7	7	7	7	7	7	7	6	5	7	7	7	7	7	3
GFS-OBV	N	N	N	N	N	N	N	N	N	N	N	N	N	N	N	N	N	N	N	BR	BR
NAM-OBV	N	N	N	N	N	N	N	N	N	N	N	N	N	BR	BR	N	N	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.

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