Radar:       Or click here for map
Radar: Rapid City SD
44.12 N - 102.82W
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
3831
352 34
Wind
1642
268 24
Tornadoes
458
28 9
Total
5931
648 45
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
1:220
Sig Severe
57
1:2,013
Tornadoes
N/A
1:2,848
F2+ Torn
N/A
1:46,580
* 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: 342%
10 year report increase: 88%
5 year report increase: -22%

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:
3.1 on 05 Jul

Primary Season:
May 05 - Aug 31

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:
14% at 01 UTC

See hourly table below

Climatological Threat Potential
Threat
Avg Prob of Occurrence
Return Interval
Natl Rank
Any Tornado
0.002%
45121 yrs
N/A
F2+ Tornado
0.001%
87504 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
47
20
21
14
32
10
111
34
1981
36
11
29
19
6
4
48
22
1982
65
24
69
31
34
19
133
47
1983
52
20
48
23
15
9
82
37
1984
32
15
31
17
13
8
58
30
1985
42
18
37
22
15
9
72
35
1986
53
22
28
15
14
10
81
35
1987
53
27
19
15
8
8
69
38
1988
23
13
35
18
9
4
41
28
1989
30
18
20
12
9
5
48
28
1990
44
24
23
15
22
11
88
42
1991
105
31
22
18
22
12
149
43
1992
56
29
37
22
20
10
96
37
1993
129
37
27
15
43
20
215
40
1994
67
27
46
27
26
11
119
39
1995
58
23
36
19
6
6
70
33
1996
172
44
40
20
11
7
194
51
1997
163
46
69
28
11
9
185
56
1998
127
42
30
18
21
11
169
51
1999
235
59
64
31
52
16
339
61
2000
296
57
109
35
2
2
300
66
2001
359
58
158
39
21
8
401
64
2002
223
41
127
36
4
4
231
54
2003
383
50
102
29
10
8
403
55
2004
293
53
92
31
16
7
325
60
2005
426
59
172
34
9
5
444
63
2006
262
52
151
34
7
3
276
57
AVG
142
34
61
24
17
9
220
45


Violent Tornadoes
Date
F
Deaths
Injuries

Monthly Averages
Month
Hail
Wind
Torn
Total
Jan
0
0
0
0
Feb
0
0
0
0
Mar
1
0
0
1
Apr
1
1
0
2
May
17
5
3
25
Jun
47
16
7
70
Jul
46
24
4
74
Aug
27
13
2
42
Sep
3
2
0
5
Oct
1
0
0
1
Nov
0
0
0
0
Dec
0
0
0
0

Hourly Averages
UTC
Hail
Wind
Torn
Total
00
543
234
60
837
01
510
260
70
840
02
358
205
43
606
03
225
158
28
411
04
137
120
14
271
05
104
83
7
194
06
67
53
4
124
07
59
48
2
109
08
41
26
2
69
09
30
15
0
45
10
16
6
0
22
11
16
8
2
26
12
18
9
6
33
13
19
5
0
24
14
13
6
0
19
15
13
0
0
13
16
11
0
0
11
17
17
6
3
26
18
51
8
5
64
19
81
18
6
105
20
178
26
29
233
21
321
47
50
418
22
431
114
55
600
23
572
187
72
831

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