LIBBY DAM, MT - COOP Northwest station 245009

245009 - LIBBY DAM, Montana

Latitude
48° 24´N

Longitude
115° 18´W

Elevation
671 meters

COOP Northwest

Montana

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10 nearest COOP Northwest stations

1 mi	NNW :	LIBBY DAM BASE, MT
4 mi	N :	WARLAND RANGER STN, MT
6 mi	W :	LIBBY 1 NE RS, MT
11 mi	N :	WARLAND 12 N, MT
17 mi	WNW :	TROY, MT
20 mi	N :	REXFORD RANGER STN, MT
21 mi	NW :	TROY 18 N, MT
21 mi	NNW :	YAAK, MT
22 mi	NNE :	EUREKA RANGER STN, MT
23 mi	SW :	HERON 2 NW, MT

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

	Total observations	%	NDJFM observations	%
TMAX	5978	32.7%	2388	31.6%
TMIN	5990	32.8%	2391	31.6%
PRCP	6266	34.3%	2569	34.0%
SNOW	2497	13.7%	200	2.6%

TMAX Help top of page

TMAX	observations	mean	std dev		Distribution	during extreme days of
NDJFM	2388 by year	38.5°F	11.3°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>=54°F	169	0.12	37	24	1.5	map	table
Extreme low events Days with TMAX<=20°F	184	-0.26	20	40	2.0*	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>=54°F	169	0.71	50	7	7.1*	map	table
Extreme low events Days with TMAX<=20°F	184	-0.93	4	81	20.2*	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>=54°F	169	25	19	1.3	map	table
Extreme low events Days with TMAX<=20°F	184	24	31	1.3	map	table

TMAX under 2 index extremes Help

Station table

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TMIN Help top of page

TMIN	observations	mean	std dev		Distribution	during extreme days of
NDJFM	2391 by year	20.1°F	11.0°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<=1°F	178	-0.24	22	39	1.8	map	table
Extreme high events Days with TMIN>=33°F	163	0.14	23	22	1.0	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<=1°F	178	-0.86	4	68	17.0*	map	table
Extreme high events Days with TMIN>=33°F	163	0.56	50	10	5.0*	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<=1°F	178	24	33	1.4	map	table
Extreme high events Days with TMIN>=33°F	163	28	24	1.2	map	table

TMIN under 2 index extremes Help

Station table

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PRCP (total liquid water equivalent) Help top of page

PRCP	observations	mean		Distribution	during extreme days of
NDJFM	2569 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"	968	0.11"	0.09	156	135	1.2	map	table
Extreme events Days with PRCP>0.17"	188	0.34"	0.16	31	25	1.2	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"	968	0.11"	-0.20	121	210	1.7*	map	table
Extreme events Days with PRCP>0.17"	188	0.34"	-0.43	11	46	4.2*	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"	968	0.11"	100	212	2.1*	map	table
Extreme events Days with PRCP>0.17"	188	0.34"	11	51	4.6*	map	table

PRCP under 2 index extremes Help

Station table

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SNOW top of page

Data not shown:
Less than 5% of days have SNOW observations during NDJFM over 1948-1997