ALTA 1NNW, WY - HCND station 480140

480140 - ALTA 1NNW, Wyoming

Latitude
43° 47´N

Longitude
111° 2´W

Elevation
6430 feet

10 nearest HCND stations

23 mi	ENE :	MORAN 5WNW, WY
28 mi	NW :	ASHTON, ID
60 mi	N :	WEST YELLOWSTONE, MT
61 mi	NNE :	LAKE YELLOWSTONE, WY
72 mi	ESE :	DUBOIS, WY
76 mi	N :	HEBGEN DAM, MT
83 mi	NNE :	YELLOWSTONE PARK MAMMOTH, WY
87 mi	SE :	PINEDALE, WY
90 mi	SSW :	GRACE, ID
104 mi	ENE :	BUFFALO BILL DAM, WY

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

	Total observations	%	NDJFM observations	%
TMAX	17665	96.7%	7320	96.8%
TMIN	17391	95.2%	7300	96.5%
PRCP	13744	75.3%	5781	76.4%
SNOW	12544	68.7%	5413	71.6%

TMAX Help top of page

TMAX	observations	mean	std dev		Distribution	during extreme days of
NDJFM	7320 by year	34.3°F	10.1°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>=50°F	507	0.09	71	51	1.4	map	table
Extreme low events Days with TMAX<=20°F	689	0.06	134	130	1.0	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>=50°F	507	0.68	155	16	9.7*	map	table
Extreme low events Days with TMAX<=20°F	689	-0.81	34	245	7.2*	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>=50°F	507	69	77	1.1	map	table
Extreme low events Days with TMAX<=20°F	689	87	138	1.6*	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	7300 by year	13.1°F	12.2°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	493	-0.24	93	139	1.5*	map	table
Extreme high events Days with TMIN>=30°F	618	-0.02	98	104	1.1	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<=-7°F	493	-0.51	37	127	3.4*	map	table
Extreme high events Days with TMIN>=30°F	618	0.18	114	59	1.9*	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	493	52	112	2.2*	map	table
Extreme high events Days with TMIN>=30°F	618	95	109	1.1	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	5781 by year	0.08"		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"	2149	0.21"	0.00	361	367	1.0	map	table
Extreme events Days with PRCP>0.31"	423	0.51"	0.05	71	61	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"	2149	0.21"	-0.30	244	479	2.0*	map	table
Extreme events Days with PRCP>0.31"	423	0.51"	-0.24	55	86	1.6*	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"	2149	0.21"	328	418	1.3*	map	table
Extreme events Days with PRCP>0.31"	423	0.51"	69	78	1.1	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	5413 by year	0.82"		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"	1643	2.70"	0.02	292	277	1.1	map	table
Extreme events Days with SNOW>4.0"	273	6.16"	0.08	52	37	1.4	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"	1643	2.70"	-0.40	154	393	2.6*	map	table
Extreme events Days with SNOW>4.0"	273	6.16"	-0.39	25	56	2.2*	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"	1643	2.70"	242	320	1.3*	map	table
Extreme events Days with SNOW>4.0"	273	6.16"	45	52	1.2	map	table

SNOW under 2 index extremes Help

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