Radar:       Or click here for map
Radar: Billings MT
45.85 N - 108.60W
Period: 1980 - 2006      Range: 124 nm

Database Overview
All reports in the domain 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
1592
 93 17
Wind
739
 150 13
Tornadoes
125
 11 3
Total
2456
 254 25
Significant severe reports 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
1:531
Sig Severe
N/A
1:5,135
Tornadoes
N/A
1:10,434
F2+ Torn
N/A
1:118,567
* Compared to 141 national radar coverage areas studied.

Annual Report Information
Annual severe weather reports
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: 827%
10 year report increase: 104%
5 year report increase: -54%
See annual table below

Daily Report Information
Annual severe weather reports
 Plot of daily severe weather reports in the search area. Lines denote a 7 day running mean.

Maximum daily value:
1.6 on 01 Jul

Primary Season:
May 17 - Aug 28
See monthly table below

Hourly Report Information
Annual severe weather reports
 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 01 UTC
See hourly table below

Climatological Threat Potential
Threat
Avg Prob of Occurrence
Return Interval
Natl Rank
Any Tornado
0.003%
34520 yrs
N/A
F2+ Tornado
0.003%
35642 yrs
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
5
4
18
15
1
1
7
18
1981
8
7
6
5
2
2
12
11
1982
10
7
11
8
0
0
10
13
1983
5
4
26
17
1
1
7
19
1984
12
8
14
11
8
6
28
20
1985
2
2
13
9
2
2
6
11
1986
4
3
16
13
2
2
8
14
1987
9
7
5
4
3
3
15
13
1988
7
6
16
11
3
3
13
19
1989
12
7
19
12
2
2
16
18
1990
12
10
11
5
2
1
16
13
1991
50
21
12
8
12
7
74
24
1992
23
12
10
7
3
3
29
20
1993
53
29
16
13
9
7
71
35
1994
23
14
37
22
3
2
29
30
1995
49
20
47
18
5
3
59
34
1996
74
26
21
9
5
5
84
27
1997
65
28
32
18
11
6
87
37
1998
68
24
29
16
7
4
82
29
1999
97
29
35
11
14
8
125
33
2000
158
23
46
19
2
2
162
30
2001
356
41
79
25
4
3
364
47
2002
127
31
92
26
7
4
141
43
2003
50
21
8
5
6
5
62
23
2004
71
23
8
6
3
3
77
25
2005
132
28
18
11
8
5
148
28
2006
110
18
94
21
0
0
110
28
AVG
59
17
27
13
5
3
91
25


Violent Tornadoes
Date
F
Deaths
Injuries
1987 21-Jul 2050 UTC
F4
0
0

Monthly Averages
Month
Hail
Wind
Torn
Total
Jan
0
0
0
0
Feb
0
0
0
0
Mar
0
0
0
0
Apr
1
0
0
1
May
5
2
0
7
Jun
22
7
2
31
Jul
23
13
1
37
Aug
8
5
1
13
Sep
1
1
0
1
Oct
0
0
0
0
Nov
0
0
0
0
Dec
0
0
0
0

Hourly Averages
UTC
Hail
Wind
Torn
Total
00
211
94
12
317
01
248
127
15
390
02
170
117
12
299
03
133
100
11
244
04
61
33
4
98
05
53
22
2
77
06
35
16
1
52
07
28
10
0
38
08
16
6
0
22
09
16
3
0
19
10
7
2
0
9
11
3
4
0
7
12
5
0
1
6
13
2
2
0
4
14
9
0
0
9
15
3
2
0
5
16
4
0
0
4
17
5
1
1
7
18
12
0
5
17
19
33
4
5
42
20
62
13
11
86
21
98
49
14
161
22
162
49
7
218
23
216
85
24
325

Click Here for tabular data (F2+ tornadoes).
Page Updated: Saturday 10-27-2007
If you have comments regarding this information, contact John Hart of the Storm Prediction Center.
Go to SPC web page Go to NWS web site Go to NOAA web site