YELLOWTAIL DAM, MT - COOP Northwest station 249240

249240 - YELLOWTAIL DAM, Montana

Latitude
45° 19´N

Longitude
107° 56´W

Elevation
1007 meters

10 nearest COOP Northwest stations

4 mi	NNE :	CAMPBELL FARM CAMP 4, MT
16 mi	E :	LODGE GRASS 4 S, MT
18 mi	ESE :	WYOLA 1 SW, MT
18 mi	NE :	CROW AGENCY, MT
20 mi	NNE :	HARDIN, MT
29 mi	W :	PRYOR 18 SE DRYHEAD R, MT
30 mi	WSW :	PRYOR 27 SE HILLSBORO, MT
35 mi	NE :	HYSHAM 25 SSE, MT
36 mi	NW :	BALLANTINE, MT
37 mi	W :	PRYOR, MT

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

	Total observations	%	NDJFM observations	%
TMAX	14109	77.3%	5748	76.0%
TMIN	14091	77.2%	5730	75.8%
PRCP	14123	77.3%	5764	76.2%
SNOW	9389	51.4%	2381	31.5%

TMAX Help top of page

TMAX	observations	mean	std dev		Distribution	during extreme days of
NDJFM	5748 by year	44.3°F	15.9°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>=65°F	401	0.45	93	28	3.3*	map	table
Extreme low events Days with TMAX<=16°F	394	-0.27	60	102	1.7*	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>=65°F	401	0.54	112	26	4.3*	map	table
Extreme low events Days with TMAX<=16°F	394	-0.92	23	164	7.1*	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>=65°F	401	78	53	1.5	map	table
Extreme low events Days with TMAX<=16°F	394	47	59	1.3	map	table

TMAX under 2 index extremes Help

Maps - choose one extreme:

TMIN Help top of page

TMIN	observations	mean	std dev		Distribution	during extreme days of
NDJFM	5730 by year	22.2°F	15.3°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<=-4°F	408	-0.28	62	105	1.7*	map	table
Extreme high events Days with TMIN>=42°F	400	0.36	85	35	2.4*	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<=-4°F	408	-1.03	20	191	9.6*	map	table
Extreme high events Days with TMIN>=42°F	400	0.42	80	23	3.5*	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	408	52	66	1.3	map	table
Extreme high events Days with TMIN>=42°F	400	66	76	1.2	map	table

TMIN under 2 index extremes Help

Maps - choose one extreme:

PRCP (total liquid water equivalent) Help top of page

PRCP	observations	mean		Distribution	during extreme days of
NDJFM	5764 by year	0.03"		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"	1388	0.13"	-0.08	211	260	1.2*	map	table
Extreme events Days with PRCP>0.20"	267	0.39"	-0.06	36	49	1.4	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"	1388	0.13"	-0.26	153	293	1.9*	map	table
Extreme events Days with PRCP>0.20"	267	0.39"	-0.38	26	62	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"	1388	0.13"	203	205	1.0	map	table
Extreme events Days with PRCP>0.20"	267	0.39"	55	33	1.7*	map	table

PRCP under 2 index extremes Help

Maps - choose one extreme:

SNOW Help top of page

SNOW	observations	mean		Distribution	during extreme days of
NDJFM	2381 by year	0.24"		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"	284	1.98"	-0.58	27	82	3.0*	map	table
Extreme events Days with SNOW>3.0"	44	5.97"	-0.73	2	15	7.5*	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"	284	1.98"	-0.62	16	80	5.0*	map	table
Extreme events Days with SNOW>3.0"	44	5.97"	-0.67	0	12	Inf*	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"	284	1.98"	41	21	2.0*	map	table
Extreme events Days with SNOW>3.0"	44	5.97"	6	2	3.0	map	table

SNOW under 2 index extremes Help

Maps - choose one extreme: