SHELBY AIRPORT, MT - COOP Northwest station 247501

247501 - SHELBY AIRPORT, Montana

Latitude
48° 33´N

Longitude
111° 52´W

Elevation
1044 meters

10 nearest COOP Northwest stations

2 mi	SSE :	SHELBY, MT
3 mi	NNW :	SHELBY 8 NW, MT
6 mi	S :	SHELBY 7 S, MT
10 mi	NE :	DUNKIRK 15 NNE, MT
14 mi	N :	SUNBURST, MT
14 mi	NNE :	SUNBURST 8 E, MT
16 mi	S :	CONRAD, MT
18 mi	S :	CONRAD 9 ESE MSR, MT
18 mi	SE :	GALATA 16 SSW, MT
18 mi	SE :	CONRAD 29 ENE PAR, MT

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

	Total observations	%	NDJFM observations	%
TMAX	10939	59.9%	4522	59.8%
TMIN	10920	59.8%	4511	59.6%
PRCP	10968	60.1%	4537	60.0%
SNOW	5353	29.3%	1051	13.9%

TMAX Help top of page

TMAX	observations	mean	std dev		Distribution	during extreme days of
NDJFM	4522 by year	35.8°F	17.1°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>=57°F	330	0.23	58	22	2.6*	map	table
Extreme low events Days with TMAX<=4°F	309	-0.86	18	123	6.8*	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>=57°F	330	0.89	125	8	15.6*	map	table
Extreme low events Days with TMAX<=4°F	309	-1.08	10	130	13.0*	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>=57°F	330	49	20	2.5*	map	table
Extreme low events Days with TMAX<=4°F	309	49	21	2.3*	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	4511 by year	13.0°F	16.3°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<=-15°F	328	-0.71	34	120	3.5*	map	table
Extreme high events Days with TMIN>=34°F	307	0.36	73	25	2.9*	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<=-15°F	328	-1.10	5	149	29.8*	map	table
Extreme high events Days with TMIN>=34°F	307	0.65	87	7	12.4*	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<=-15°F	328	50	30	1.7*	map	table
Extreme high events Days with TMIN>=34°F	307	43	42	1.0	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	4537 by year	0.01"		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"	720	0.06"	-0.35	77	165	2.1*	map	table
Extreme events Days with PRCP>0.08"	131	0.19"	-0.38	13	28	2.2*	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"	720	0.06"	-0.38	69	174	2.5*	map	table
Extreme events Days with PRCP>0.08"	131	0.19"	-0.12	17	19	1.1	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"	720	0.06"	96	84	1.1	map	table
Extreme events Days with PRCP>0.08"	131	0.19"	12	9	1.3	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	1051 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"	25	1.22"	-0.13	1	3	3.0	map	table
Extreme events Days with SNOW>1.5"	5	2.80"	-0.02	0	1	Inf	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"	25	1.22"	-0.17	1	2	2.0	map	table
Extreme events Days with SNOW>1.5"	5	2.80"	-0.33	0	1	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"	25	1.22"	7	0	Inf	map	table
Extreme events Days with SNOW>1.5"	5	2.80"	0	0	NaN	map	table

SNOW under 2 index extremes Help

Maps - choose one extreme: