| Radar:
Missoula MT |
47.03 N
- 113.98W
|
Period:
1980
-
2006
Range: 124 nm
|
Database Overview
All severe weather
reports during the period are plotted. Blue dots represent damaging
wind, green dots represent large hail, and red dots represent tornadoes.
[Click to enlarge] |
| |
All
Rpts |
Sig
Rpts |
Avg
Days |
| Hail |
632
|
31 |
10 |
| Wind |
597
|
54 |
11 |
| Tornadoes |
35
|
1 |
1 |
| Total |
1264
|
86 |
17 |
|
Significant
severe weather reports during the period are plotted. Only tornadoes
F2 or stronger, wind gusts of 65 knots or stronger, and hail of
2" diameter or larger are plotted. [Click to enlarge] |
| Category |
Rank*
|
Freq/mi2
|
| Any
Severe |
N/A
|
1:1,032
|
| Sig
Severe |
N/A
|
1:15,166
|
| Tornadoes |
N/A
|
1:37,264
|
| F2+
Torn |
N/A
|
1:1,304,235
|
* Compared to
141 national radar coverage areas studied. |
Annual
Report Information
|
|
Plot
of annual severe weather reports in the search area. The dashed
magenta line denotes a 5 year running average of all reports.
20 year report increase: 5500%
10 year report increase: 143%
5 year report increase: 96%
See
annual table below
|
Daily
Report Information
|
|
Plot
of daily severe weather reports in the search area. Lines denote
a 7 day running mean.
Maximum daily value:
0.7
on 08 Jul
Primary Season:
May 16
- Sep 04
See
monthly table below
|
Hourly
Report Information
|
|
Plot
of hourly severe weather reports in the search area. Values are
in percent of total, and have been rounded to the nearest hour (UTC).
Maximum hourly value:
16%
at 23 UTC
See
hourly table below
|
Climatological
Threat Potential
|
Threat
|
Avg Prob of Occurrence
|
Return Interval
|
Natl Rank
|
| Any
Tornado |
0.000%
|
N/A
|
N/A
|
| F2+
Tornado |
0.000%
|
N/A
|
N/A
|
|
This
table represents the average annual probability and return interval
of each event for any point within the search domain.
Read details of computational
method
|
Annual
Totals
|
Year
|
Hail
|
Wind
|
Tornado
|
Total
|
| |
Rpt
|
Days
|
Rpt
|
Days
|
Rpt
|
Days
|
Rpt
|
Days
|
|
1980
|
4
|
3
|
4
|
4
|
1
|
1
|
6
|
6
|
|
1981
|
4
|
4
|
8
|
7
|
2
|
1
|
8
|
11
|
|
1982
|
17
|
7
|
17
|
8
|
1
|
1
|
19
|
10
|
|
1983
|
11
|
8
|
14
|
8
|
1
|
1
|
13
|
12
|
|
1984
|
8
|
7
|
13
|
6
|
0
|
0
|
8
|
10
|
|
1985
|
10
|
5
|
4
|
3
|
0
|
0
|
10
|
8
|
|
1986
|
0
|
0
|
0
|
0
|
2
|
2
|
4
|
2
|
|
1987
|
9
|
7
|
21
|
8
|
2
|
2
|
13
|
14
|
|
1988
|
21
|
7
|
22
|
15
|
4
|
4
|
29
|
23
|
|
1989
|
10
|
7
|
35
|
15
|
0
|
0
|
10
|
18
|
|
1990
|
7
|
5
|
12
|
5
|
1
|
1
|
9
|
9
|
|
1991
|
10
|
8
|
5
|
5
|
3
|
3
|
16
|
15
|
|
1992
|
14
|
7
|
10
|
7
|
3
|
3
|
20
|
15
|
|
1993
|
22
|
13
|
35
|
18
|
4
|
2
|
30
|
25
|
|
1994
|
9
|
4
|
27
|
16
|
2
|
2
|
13
|
18
|
|
1995
|
39
|
19
|
29
|
12
|
1
|
1
|
41
|
25
|
|
1996
|
34
|
15
|
11
|
7
|
1
|
1
|
36
|
19
|
|
1997
|
49
|
21
|
20
|
7
|
4
|
4
|
57
|
25
|
|
1998
|
41
|
18
|
43
|
17
|
1
|
1
|
43
|
26
|
|
1999
|
20
|
9
|
10
|
9
|
0
|
0
|
20
|
14
|
|
2000
|
28
|
11
|
29
|
16
|
1
|
1
|
30
|
26
|
|
2001
|
27
|
10
|
30
|
17
|
0
|
0
|
27
|
21
|
|
2002
|
50
|
19
|
50
|
17
|
0
|
0
|
50
|
24
|
|
2003
|
38
|
14
|
47
|
17
|
0
|
0
|
38
|
21
|
|
2004
|
55
|
20
|
36
|
16
|
0
|
0
|
55
|
30
|
|
2005
|
32
|
12
|
17
|
9
|
0
|
0
|
32
|
15
|
|
2006
|
63
|
17
|
48
|
16
|
1
|
1
|
65
|
26
|
|
AVG
|
23
|
10
|
22
|
11
|
1
|
1
|
47
|
17
|
|
|
Violent
Tornadoes
|
|
Monthly
Averages
|
Month
|
Hail
|
Wind
|
Torn
|
Total
|
|
Jan
|
0
|
0
|
0
|
0
|
|
Feb
|
0
|
0
|
0
|
0
|
|
Mar
|
0
|
0
|
0
|
0
|
|
Apr
|
0
|
1
|
0
|
1
|
|
May
|
2
|
3
|
0
|
5
|
|
Jun
|
8
|
6
|
1
|
15
|
|
Jul
|
7
|
6
|
0
|
13
|
|
Aug
|
6
|
5
|
0
|
11
|
|
Sep
|
1
|
1
|
0
|
2
|
|
Oct
|
0
|
0
|
0
|
0
|
|
Nov
|
0
|
0
|
0
|
0
|
|
Dec
|
0
|
0
|
0
|
0
|
|
Hourly
Averages
|
UTC
|
Hail
|
Wind
|
Torn
|
Total
|
|
00
|
83
|
105
|
3
|
191
|
|
01
|
84
|
76
|
3
|
163
|
|
02
|
57
|
76
|
3
|
136
|
|
03
|
49
|
53
|
3
|
105
|
|
04
|
31
|
21
|
0
|
52
|
|
05
|
11
|
14
|
0
|
25
|
|
06
|
6
|
8
|
0
|
14
|
|
07
|
2
|
9
|
1
|
12
|
|
08
|
4
|
6
|
0
|
10
|
|
09
|
2
|
4
|
0
|
6
|
|
10
|
1
|
1
|
0
|
2
|
|
11
|
3
|
3
|
0
|
6
|
|
12
|
2
|
0
|
0
|
2
|
|
13
|
3
|
2
|
0
|
5
|
|
14
|
2
|
0
|
0
|
2
|
|
15
|
3
|
1
|
0
|
4
|
|
16
|
2
|
3
|
0
|
5
|
|
17
|
5
|
2
|
1
|
8
|
|
18
|
10
|
5
|
1
|
16
|
|
19
|
17
|
7
|
3
|
27
|
|
20
|
37
|
22
|
1
|
60
|
|
21
|
60
|
26
|
4
|
90
|
|
22
|
51
|
70
|
5
|
126
|
|
23
|
107
|
83
|
7
|
197
|
|
Click Here for tabular data (F2+ tornadoes).
|