241008 - BOULDER, Montana

Latitude
46° 14´N
Longitude
112° 7´W
Elevation
1495 meters

COOP Northwest

Montana
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Main
10 nearest COOP Northwest stations
5 miWNW :BASIN, MT
6 miWNW :BASIN 3 W, MT
10 miN :CHESSMAN RESERVOIR, MT
11 miSW :ELK PARK, MT
12 miNNW :RIMINI, MT
13 miWSW :MOULTON RESERVOIR, MT
13 miN :UNIONVILLE, MT
13 miN :RIMINI 4 NE, MT
15 miN :HELENA, MT
15 miNNW :MACDONALD OASS, MT

Weather variables    Help
Click a weather variable name to jump down to those statistics.
Total
observations
%
NDJFM
observations
%
TMAX
17890
98.0%
7428
98.2%
TMIN
17706
97.0%
7321
96.8%
PRCP
17889
98.0%
7415
98.0%
SNOW
13560
74.2%
4370
57.8%




TMAX     Help     top of page

TMAX
observations
mean
std dev
   
Distribution
during extreme days of
NDJFM
7428  by year
38.6°F
13.1°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>=56°F
539
0.33
112
38
2.9*
map
table
Extreme low events
Days with TMAX<=17°F
531
-0.07
101
122
1.2
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>=56°F
539
0.65
168
24
7.0*
map
table
Extreme low events
Days with TMAX<=17°F
531
-0.99
12
217
18.1*
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>=56°F
539
78
88
1.1
map
table
Extreme low events
Days with TMAX<=17°F
531
57
103
1.8*
map
table

TMAX under 2 index extremes     Help
Station table Maps - choose one extreme:
High NAMLow NAM High PNALow PNA High CTILow CTI




TMIN     Help     top of page

TMIN
observations
mean
std dev
   
Distribution
during extreme days of
NDJFM
7321  by year
14.0°F
14.3°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<=-11°F
505
-0.10
105
118
1.1
map
table
Extreme high events
Days with TMIN>=31°F
588
0.19
105
69
1.5*
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<=-11°F
505
-0.99
15
217
14.5*
map
table
Extreme high events
Days with TMIN>=31°F
588
0.29
113
47
2.4*
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<=-11°F
505
59
85
1.4*
map
table
Extreme high events
Days with TMIN>=31°F
588
78
112
1.4*
map
table

TMIN under 2 index extremes     Help
Station table Maps - choose one extreme:
High NAMLow NAM High PNALow PNA High CTILow CTI




PRCP (total liquid water equivalent)     Help     top of page

PRCP
observations
mean
   
Distribution
during extreme days of
NDJFM
7415  by year
0.02"
   
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"
1605
0.07"
-0.05
249
284
1.1
map
table
Extreme events
Days with PRCP>0.11"
308
0.21"
0.01
53
57
1.1
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"
1605
0.07"
-0.40
147
385
2.6*
map
table
Extreme events
Days with PRCP>0.11"
308
0.21"
-0.54
18
76
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"
1605
0.07"
218
288
1.3*
map
table
Extreme events
Days with PRCP>0.11"
308
0.21"
34
49
1.4
map
table

PRCP under 2 index extremes     Help
Station table Maps - choose one extreme:
High NAMLow NAM High PNALow PNA High CTILow CTI




SNOW     Help     top of page

SNOW
observations
mean
   
Distribution
during extreme days of
NDJFM
4370  by year
0.18"
   
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"
425
1.87"
-0.31
49
91
1.9*
map
table
Extreme events
Days with SNOW>3.0"
55
5.37"
-0.56
7
18
2.6
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"
425
1.87"
-0.80
19
148
7.8*
map
table
Extreme events
Days with SNOW>3.0"
55
5.37"
-0.88
4
21
5.2*
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"
425
1.87"
59
99
1.7*
map
table
Extreme events
Days with SNOW>3.0"
55
5.37"
7
10
1.4
map
table

SNOW under 2 index extremes     Help
Station table Maps - choose one extreme:
High NAMLow NAM High PNALow PNA High CTILow CTI