TROY, MT - COOP Northwest station 248390

248390 - TROY, Montana

Latitude
48° 29´N

Longitude
115° 55´W

Elevation
588 meters

10 nearest COOP Northwest stations

10 mi	N :	TROY 18 N, MT
11 mi	ESE :	LIBBY 1 NE RS, MT
16 mi	NNE :	YAAK, MT
17 mi	E :	LIBBY DAM BASE, MT
17 mi	ESE :	LIBBY DAM, MT
17 mi	S :	HERON 2 NW, MT
17 mi	E :	WARLAND RANGER STN, MT
18 mi	ENE :	WARLAND 12 N, MT
26 mi	NE :	REXFORD RANGER STN, MT
28 mi	SW :	CABINET GORGE, ID

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

	Total observations	%	NDJFM observations	%
TMAX	12380	67.8%	5206	68.8%
TMIN	12356	67.7%	5199	68.7%
PRCP	12860	70.4%	5464	72.2%
SNOW	8270	45.3%	2802	37.0%

TMAX Help top of page

TMAX	observations	mean	std dev		Distribution	during extreme days of
NDJFM	5206 by year	38.9°F	10.4°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	389	0.33	89	37	2.4*	map	table
Extreme low events Days with TMAX<=23°F	366	-0.16	63	93	1.5	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	389	0.63	109	19	5.7*	map	table
Extreme low events Days with TMAX<=23°F	366	-0.91	15	151	10.1*	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	389	95	16	5.9*	map	table
Extreme low events Days with TMAX<=23°F	366	52	32	1.6*	map	table

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TMIN Help top of page

TMIN	observations	mean	std dev		Distribution	during extreme days of
NDJFM	5199 by year	23.4°F	10.8°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<=4°F	361	-0.18	64	94	1.5	map	table
Extreme high events Days with TMIN>=35°F	422	0.23	68	33	2.1*	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<=4°F	361	-0.87	16	135	8.4*	map	table
Extreme high events Days with TMIN>=35°F	422	0.25	80	32	2.5*	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<=4°F	361	48	44	1.1	map	table
Extreme high events Days with TMIN>=35°F	422	92	31	3.0*	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	5464 by year	0.09"		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"	1965	0.26"	0.12	364	275	1.3*	map	table
Extreme events Days with PRCP>0.42"	383	0.73"	0.23	75	40	1.9*	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"	1965	0.26"	-0.18	250	388	1.6*	map	table
Extreme events Days with PRCP>0.42"	383	0.73"	-0.32	31	78	2.5*	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"	1965	0.26"	349	212	1.6*	map	table
Extreme events Days with PRCP>0.42"	383	0.73"	64	54	1.2	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	2802 by year	0.26"		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"	326	2.20"	-0.11	48	64	1.3	map	table
Extreme events Days with SNOW>3.0"	63	6.10"	-0.00	11	12	1.1	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"	326	2.20"	-0.48	27	82	3.0*	map	table
Extreme events Days with SNOW>3.0"	63	6.10"	-0.59	1	14	14.0*	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"	326	2.20"	58	15	3.9*	map	table
Extreme events Days with SNOW>3.0"	63	6.10"	11	5	2.2	map	table

SNOW under 2 index extremes Help

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