POTOMAC, MT - COOP Northwest station 246685

246685 - POTOMAC, Montana

Latitude
46° 53´N

Longitude
113° 34´W

Elevation
1103 meters

10 nearest COOP Northwest stations

7 mi	ESE :	GARNET, MT
11 mi	W :	MISSOULA 2 NE, MT
14 mi	E :	OVANDO 9 SSE, MT
15 mi	SE :	DRUMMOND, MT
15 mi	SE :	DRUMMOND CAA FIELD, MT
24 mi	SSE :	PHILIPSBURG, MT
25 mi	SSE :	PHILIPSBURG R S, MT
29 mi	SSE :	PHILIPSBURG 7 S, MT
31 mi	SSE :	SILVER LAKE, MT
32 mi	W :	MISSOULA 2 WNW, MT

Weather variables Help
Click a weather variable name to jump down to those statistics.

	Total observations	%	NDJFM observations	%
TMAX	10927	59.8%	4532	59.9%
TMIN	10933	59.9%	4547	60.1%
PRCP	11090	60.7%	4580	60.6%
SNOW	10905	59.7%	4522	59.8%

TMAX Help top of page

TMAX	observations	mean	std dev		Distribution	during extreme days of
NDJFM	4532 by year	36.7°F	12.1°F		overall	NAM	PNA	CTI

TMAX and NAM Help scatterplot	days by month	mean NAM index	extreme high NAM days	extreme low NAM days	ratio of extreme high:low NAM days
Extreme high events Days with TMAX>=53°F	344	0.49	91	28	3.2*	map	table
Extreme low events Days with TMAX<=18°F	336	0.06	68	65	1.0	map	table

TMAX and PNA Help scatterplot	days by month	mean PNA index	extreme high PNA days	extreme low PNA days	ratio of extreme high:low PNA days
Extreme high events Days with TMAX>=53°F	344	0.70	112	17	6.6*	map	table
Extreme low events Days with TMAX<=18°F	336	-0.75	25	124	5.0*	map	table

TMAX and CTI Help	days by month	high CTI days (moderate to strong El Niño winters)	low CTI days (moderate to strong La Niña winters)	ratio of high:low CTI (El Niño:La Niña days)
Extreme high events Days with TMAX>=53°F	344	75	30	2.5*	map	table
Extreme low events Days with TMAX<=18°F	336	61	26	2.3*	map	table

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TMIN Help top of page

TMIN	observations	mean	std dev		Distribution	during extreme days of
NDJFM	4547 by year	13.7°F	14.3°F		overall	NAM	PNA	CTI

TMIN and NAM Help scatterplot	days by month	mean NAM index	extreme high NAM days	extreme low NAM days	ratio of extreme high:low NAM days
Extreme low events Days with TMIN<=-11°F	317	0.05	66	63	1.0	map	table
Extreme high events Days with TMIN>=31°F	323	0.22	65	49	1.3	map	table

TMIN and PNA Help scatterplot	days by month	mean PNA index	extreme high PNA days	extreme low PNA days	ratio of extreme high:low PNA days
Extreme low events Days with TMIN<=-11°F	317	-0.67	19	110	5.8*	map	table
Extreme high events Days with TMIN>=31°F	323	0.22	62	32	1.9*	map	table

TMIN and CTI Help	days by month	high CTI days (moderate to strong El Niño winters)	low CTI days (moderate to strong La Niña winters)	ratio of high:low CTI (El Niño:La Niña days)
Extreme low events Days with TMIN<=-11°F	317	61	28	2.2*	map	table
Extreme high events Days with TMIN>=31°F	323	48	39	1.2	map	table

TMIN under 2 index extremes Help

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PRCP (total liquid water equivalent) Help top of page

PRCP	observations	mean		Distribution	during extreme days of
NDJFM	4580 by year	0.04"		overall	NAM	PNA	CTI

PRCP and NAM Help scatterplot	days by month	mean	mean NAM index	extreme high NAM days	extreme low NAM days	ratio of extreme high:low NAM days
Observed events Days with PRCP>0.00"	1475	0.13"	0.03	239	245	1.0	map	table
Extreme events Days with PRCP>0.20"	273	0.37"	0.01	47	44	1.1	map	table

PRCP and PNA Help scatterplot	days by month	mean	mean PNA index	extreme high PNA days	extreme low PNA days	ratio of extreme high:low PNA days
Observed events Days with PRCP>0.00"	1475	0.13"	-0.30	162	328	2.0*	map	table
Extreme events Days with PRCP>0.20"	273	0.37"	-0.47	30	71	2.4*	map	table

PRCP and CTI Help	days by month	mean	high CTI days (moderate to strong El Niño winters)	low CTI days (moderate to strong La Niña winters)	ratio of high:low CTI (El Niño:La Niña days)
Observed events Days with PRCP>0.00"	1475	0.13"	277	162	1.7*	map	table
Extreme events Days with PRCP>0.20"	273	0.37"	52	30	1.7*	map	table

PRCP under 2 index extremes Help

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SNOW Help top of page

SNOW	observations	mean		Distribution	during extreme days of
NDJFM	4522 by year	0.38"		overall	NAM	PNA	CTI

SNOW and NAM Help scatterplot	days by month	mean	mean NAM index	extreme high NAM days	extreme low NAM days	ratio of extreme high:low NAM days
Observed events Days with SNOW>0.0"	844	2.04"	-0.03	140	154	1.1	map	table
Extreme events Days with SNOW>3.0"	144	5.56"	-0.11	28	29	1.0	map	table

SNOW and PNA Help scatterplot	days by month	mean	mean PNA index	extreme high PNA days	extreme low PNA days	ratio of extreme high:low PNA days
Observed events Days with SNOW>0.0"	844	2.04"	-0.62	57	251	4.4*	map	table
Extreme events Days with SNOW>3.0"	144	5.56"	-0.84	3	48	16.0*	map	table

SNOW and CTI Help	days by month	mean	high CTI days (moderate to strong El Niño winters)	low CTI days (moderate to strong La Niña winters)	ratio of high:low CTI (El Niño:La Niña days)
Observed events Days with SNOW>0.0"	844	2.04"	158	87	1.8*	map	table
Extreme events Days with SNOW>3.0"	144	5.56"	22	18	1.2	map	table

SNOW under 2 index extremes Help

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