Radar:       Or click here for map
Radar: Duluth MN
46.83 N - 92.20W
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
2551
169 21
Wind
2773
182 21
Tornadoes
301
51 6
Total
5625
402 31
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
1:232
Sig Severe
74
1:3,244
Tornadoes
N/A
1:4,333
F2+ Torn
N/A
1:25,573
* 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: 206%
10 year report increase: 38%
5 year report increase: -16%

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:
3.0 on 30 Jun

Primary Season:
Apr 15 - Sep 17

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 23 UTC

See hourly table below

Climatological Threat Potential
Threat
Avg Prob of Occurrence
Return Interval
Natl Rank
Any Tornado
0.015%
6516 yrs
61
F2+ Tornado
0.013%
7725 yrs
59
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
31
18
53
25
12
5
55
35
1981
25
11
34
15
17
10
59
23
1982
33
12
61
14
8
4
49
21
1983
18
7
133
22
9
4
36
27
1984
33
13
90
21
9
4
51
24
1985
76
23
61
24
11
8
98
34
1986
34
17
68
19
10
8
54
30
1987
38
16
64
17
9
8
56
26
1988
35
19
54
19
6
5
47
32
1989
46
12
34
15
4
4
54
19
1990
54
23
40
14
9
7
72
33
1991
51
17
102
19
15
7
81
27
1992
20
8
31
12
10
5
40
16
1993
17
6
21
12
12
6
41
17
1994
63
22
98
26
14
8
91
36
1995
48
21
96
22
12
6
72
32
1996
117
29
124
20
7
2
131
38
1997
76
13
117
17
16
8
108
24
1998
149
32
159
27
14
7
177
39
1999
175
28
286
24
13
8
201
36
2000
192
21
99
17
8
6
208
26
2001
231
29
160
27
17
8
265
39
2002
294
39
158
30
9
7
312
49
2003
132
29
91
18
8
5
148
32
2004
179
26
134
25
12
8
203
38
2005
174
33
274
28
28
9
230
42
2006
210
34
131
25
2
2
214
37
AVG
94
21
103
21
11
6
208
31


Violent Tornadoes
Date
F
Deaths
Injuries
1983 03-Jul 1805 UTC
F4
0
4

Monthly Averages
Month
Hail
Wind
Torn
Total
Jan
0
0
0
0
Feb
0
0
0
0
Mar
1
0
0
1
Apr
9
5
1
14
May
14
9
1
24
Jun
23
27
3
53
Jul
23
37
3
63
Aug
15
17
1
33
Sep
8
7
2
16
Oct
1
1
0
2
Nov
0
0
0
0
Dec
0
0
0
0

Hourly Averages
UTC
Hail
Wind
Torn
Total
00
302
252
52
606
01
227
235
43
505
02
146
156
21
323
03
104
143
18
265
04
92
192
3
287
05
77
138
4
219
06
48
111
1
160
07
52
116
0
168
08
36
83
1
120
09
33
69
1
103
10
29
87
0
116
11
35
59
0
94
12
28
35
3
66
13
43
36
2
81
14
32
27
2
61
15
32
36
0
68
16
47
66
2
115
17
51
51
3
105
18
60
58
11
129
19
90
91
6
187
20
127
114
21
262
21
231
157
36
424
22
269
228
33
530
23
360
233
38
631

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