Radar:       Or click here for map
Radar: Aberdeen SD
45.45 N - 98.40W
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
5676
411 38
Wind
3409
515 28
Tornadoes
845
87 13
Total
9930
1013 47
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
65
1:131
Sig Severe
27
1:1,287
Tornadoes
53
1:1,543
F2+ Torn
65
1:14,991
* 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: 276%
10 year report increase: 101%
5 year report increase: 12%

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:
4.9 on 24 Jun

Primary Season:
May 05 - Sep 11

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:
11% at 01 UTC

See hourly table below

Climatological Threat Potential
Threat
Avg Prob of Occurrence
Return Interval
Natl Rank
Any Tornado
0.010%
9582 yrs
73
F2+ Tornado
0.009%
11590 yrs
70
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
131
32
96
25
29
13
189
39
1981
53
21
55
18
17
11
87
31
1982
76
31
81
26
25
14
126
43
1983
69
19
121
28
19
12
107
37
1984
59
20
52
20
31
14
121
34
1985
107
34
92
31
45
16
197
47
1986
97
28
76
27
33
17
163
42
1987
79
26
78
26
41
19
161
37
1988
62
27
56
28
16
11
94
42
1989
70
26
45
25
5
3
80
39
1990
76
28
90
21
12
8
100
38
1991
171
39
104
36
29
18
229
49
1992
116
30
57
21
43
14
202
37
1993
108
33
109
31
63
18
234
44
1994
138
38
81
30
23
13
184
47
1995
90
30
92
20
12
8
114
36
1996
213
46
118
25
54
13
321
51
1997
211
40
160
33
35
15
281
51
1998
223
34
108
26
25
13
273
40
1999
285
45
198
31
33
12
351
47
2000
319
46
144
32
21
8
361
53
2001
426
50
230
28
35
9
496
55
2002
536
62
259
40
22
12
580
66
2003
345
46
201
20
58
14
461
49
2004
526
64
172
31
32
14
590
69
2005
527
57
364
32
45
18
617
61
2006
563
66
170
40
42
17
647
72
AVG
210
38
126
28
31
13
368
47


Violent Tornadoes
Date
F
Deaths
Injuries
1993 07-Jun 2130 UTC
F4
0
5
1993 07-Jun 2140 UTC
F4
0
4
1998 31-May 0126 UTC
F4
6
150
2000 25-Jul 2257 UTC
F4
1
15
2002 24-Jun 0124 UTC
F4
0
0
2002 11-Aug 2100 UTC
F4
0
0
2003 25-Jun 0029 UTC
F4
0
4
2004 19-Jul 0125 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
1
Apr
6
2
0
8
May
25
10
5
40
Jun
59
34
12
105
Jul
54
46
8
108
Aug
47
27
4
79
Sep
17
5
1
23
Oct
1
2
0
3
Nov
0
0
0
0
Dec
0
0
0
0

Hourly Averages
UTC
Hail
Wind
Torn
Total
00
699
252
118
1069
01
661
346
109
1116
02
477
306
88
871
03
354
275
51
680
04
244
332
33
609
05
199
254
15
468
06
149
229
9
387
07
125
196
6
327
08
100
134
8
242
09
83
96
7
186
10
64
61
0
125
11
69
62
0
131
12
89
76
1
166
13
92
51
3
146
14
93
49
3
145
15
74
48
2
124
16
71
40
11
122
17
85
23
1
109
18
89
22
9
120
19
141
36
24
201
20
235
59
48
342
21
377
114
72
563
22
499
152
96
747
23
607
196
131
934

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.
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