TWIN BRIDGES, MT - COOP Northwest station 248430

248430 - TWIN BRIDGES, Montana

Latitude
45° 33´N

Longitude
112° 20´W

Elevation
1410 meters

10 nearest COOP Northwest stations

6 mi	NNE :	SILVER STAR, MT
10 mi	WSW :	GLEN 2 E, MT
11 mi	WNW :	MELROSE, MT
12 mi	SSE :	ALDER, MT
12 mi	NNE :	WHITEHALL AIRPORT, MT
13 mi	WSW :	APEX 2 NW, MT
14 mi	SSE :	ALDER RUBY DAM, MT
14 mi	SSW :	DILLON AP, MT
15 mi	NW :	DIVIDE, MT
15 mi	NNE :	WHITEHALL, MT

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

	Total observations	%	NDJFM observations	%
TMAX	15235	83.4%	6373	84.3%
TMIN	15228	83.4%	6376	84.3%
PRCP	17298	94.7%	7166	94.8%
SNOW	11752	64.3%	3010	39.8%

TMAX Help top of page

TMAX	observations	mean	std dev		Distribution	during extreme days of
NDJFM	6373 by year	40.0°F	12.9°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>=57°F	485	0.38	98	28	3.5*	map	table
Extreme low events Days with TMAX<=19°F	448	-0.03	94	101	1.1	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>=57°F	485	0.55	133	23	5.8*	map	table
Extreme low events Days with TMAX<=19°F	448	-0.89	12	164	13.7*	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>=57°F	485	83	47	1.8*	map	table
Extreme low events Days with TMAX<=19°F	448	62	60	1.0	map	table

TMAX under 2 index extremes Help

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TMIN Help top of page

TMIN	observations	mean	std dev		Distribution	during extreme days of
NDJFM	6376 by year	15.3°F	12.9°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<=-7°F	429	-0.05	91	100	1.1	map	table
Extreme high events Days with TMIN>=32°F	460	0.14	71	50	1.4	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<=-7°F	429	-0.86	13	159	12.2*	map	table
Extreme high events Days with TMIN>=32°F	460	0.10	75	48	1.6*	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<=-7°F	429	67	55	1.2	map	table
Extreme high events Days with TMIN>=32°F	460	78	61	1.3	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	7166 by year	0.01"		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"	1044	0.07"	-0.05	170	188	1.1	map	table
Extreme events Days with PRCP>0.10"	191	0.23"	-0.18	25	38	1.5	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"	1044	0.07"	-0.24	120	206	1.7*	map	table
Extreme events Days with PRCP>0.10"	191	0.23"	-0.10	23	35	1.5	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"	1044	0.07"	193	134	1.4*	map	table
Extreme events Days with PRCP>0.10"	191	0.23"	45	24	1.9*	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	3010 by year	0.07"		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"	139	1.51"	-0.33	20	35	1.8	map	table
Extreme events Days with SNOW>2.0"	27	3.83"	-0.07	7	7	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"	139	1.51"	-0.65	8	41	5.1*	map	table
Extreme events Days with SNOW>2.0"	27	3.83"	-0.45	2	8	4.0	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"	139	1.51"	18	21	1.2	map	table
Extreme events Days with SNOW>2.0"	27	3.83"	4	3	1.3	map	table

SNOW under 2 index extremes Help

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