CANYON FERRY DAM, MT - COOP Northwest station 241470

241470 - CANYON FERRY DAM, Montana

Latitude
46° 39´N

Longitude
111° 44´W

Elevation
1119 meters

10 nearest COOP Northwest stations

0 mi	E :	CANYON FERRY DAM, MT
1 mi	SE :	CANYON FERRY, MT
6 mi	WSW :	EAST HELENA, MT
7 mi	WSW :	HELENA AP ASOS, MT
10 mi	ENE :	WATSON 3 N, MT
14 mi	SSE :	TOWNSEND, MT
17 mi	ENE :	WHITE SULPHUR SPRNGS 24 NNW, MT
18 mi	E :	FORT LOGAN 3 ESE, MT
18 mi	SE :	TOWNSEND 12 ENE, MT
19 mi	ENE :	MILLEGAN 14 SE, MT

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

	Total observations	%	NDJFM observations	%
TMAX	14334	78.5%	5936	78.5%
TMIN	14332	78.5%	5934	78.5%
PRCP	14381	78.7%	5965	78.9%
SNOW	8482	46.4%	1493	19.7%

TMAX Help top of page

TMAX	observations	mean	std dev		Distribution	during extreme days of
NDJFM	5936 by year	38.4°F	13.7°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>=56°F	403	0.34	87	24	3.6*	map	table
Extreme low events Days with TMAX<=14°F	413	-0.20	80	114	1.4	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>=56°F	403	0.32	87	33	2.6*	map	table
Extreme low events Days with TMAX<=14°F	413	-0.97	9	158	17.6*	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>=56°F	403	74	41	1.8*	map	table
Extreme low events Days with TMAX<=14°F	413	55	44	1.2	map	table

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TMIN Help top of page

TMIN	observations	mean	std dev		Distribution	during extreme days of
NDJFM	5934 by year	19.7°F	13.6°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<=-5°F	416	-0.20	84	117	1.4	map	table
Extreme high events Days with TMIN>=35°F	521	0.22	95	50	1.9*	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<=-5°F	416	-0.97	9	167	18.6*	map	table
Extreme high events Days with TMIN>=35°F	521	0.26	95	35	2.7*	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<=-5°F	416	55	43	1.3	map	table
Extreme high events Days with TMIN>=35°F	521	108	53	2.0*	map	table

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PRCP (total liquid water equivalent) Help top of page

PRCP	observations	mean		Distribution	during extreme days of
NDJFM	5965 by year	0.02"		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"	1179	0.08"	-0.05	189	214	1.1	map	table
Extreme events Days with PRCP>0.12"	216	0.22"	-0.02	39	39	1.0	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"	1179	0.08"	-0.33	140	281	2.0*	map	table
Extreme events Days with PRCP>0.12"	216	0.22"	-0.31	28	49	1.8*	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"	1179	0.08"	195	146	1.3*	map	table
Extreme events Days with PRCP>0.12"	216	0.22"	35	21	1.7	map	table

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SNOW Help top of page

SNOW	observations	mean		Distribution	during extreme days of
NDJFM	1493 by year	0.03"		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"	35	1.38"	0.33	13	8	1.6	map	table
Extreme events Days with SNOW>2.0"	4	4.88"	0.13	2	2	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"	35	1.38"	-0.91	3	13	4.3	map	table
Extreme events Days with SNOW>2.0"	4	4.88"	0.06	0	0	NaN	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"	35	1.38"	8	1	8.0*	map	table
Extreme events Days with SNOW>2.0"	4	4.88"	2	0	Inf	map	table

SNOW under 2 index extremes Help

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