Radar:       Or click here for map
Radar: Grand Rapids MI
42.88 N - 85.53W
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
3882
 142 28
Wind
7855
 308 36
Tornadoes
553
 102 11
Total
12290
 552 46
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
56
1:106
Sig Severe
63
1:2,363
Tornadoes
N/A
1:2,358
F2+ Torn
59
1:12,787
* 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: 286%
10 year report increase: 169%
5 year report increase: 34%
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:
5.4 on 19 Jul

Primary Season:
May 06 - 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:
11% at 23 UTC
See hourly table below

Climatological Threat Potential
Threat
Avg Prob of Occurrence
Return Interval
Natl Rank
Any Tornado
0.013%
7859 yrs
66
F2+ Tornado
0.010%
9848 yrs
66
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
75
22
219
39
33
18
141
48
1981
13
8
66
23
11
9
35
28
1982
17
11
122
23
20
12
57
32
1983
66
17
292
31
25
14
116
35
1984
36
17
105
33
22
12
80
45
1985
96
20
162
24
15
13
126
33
1986
75
20
152
35
31
18
137
45
1987
42
19
183
37
22
17
86
43
1988
85
27
251
42
22
13
129
48
1989
56
20
152
31
22
12
100
39
1990
46
20
133
28
23
14
92
40
1991
107
24
323
37
34
13
175
43
1992
54
23
268
24
30
10
114
37
1993
76
28
171
36
9
8
94
45
1994
160
28
233
38
15
9
190
46
1995
73
28
244
42
9
6
91
49
1996
133
35
216
33
21
11
175
51
1997
114
27
331
36
22
4
158
41
1998
211
31
597
37
35
15
281
50
1999
175
31
365
38
9
7
193
47
2000
343
36
421
43
11
7
365
54
2001
247
44
448
54
47
11
341
66
2002
119
28
334
37
9
5
137
46
2003
456
44
547
46
15
11
486
56
2004
328
44
527
45
23
12
374
59
2005
181
40
506
42
6
6
193
58
2006
498
53
487
50
12
10
522
70
AVG
144
28
291
36
20
11
455
46


Violent Tornadoes
Date
F
Deaths
Injuries
1981 04-Apr 0604 UTC
F4
3
53
1984 27-Apr 2239 UTC
F4
1
14
2002 10-Nov 2015 UTC
F4
4
17

Monthly Averages
Month
Hail
Wind
Torn
Total
Jan
0
2
0
2
Feb
0
1
0
1
Mar
7
6
1
14
Apr
17
14
1
33
May
35
39
4
78
Jun
31
60
5
95
Jul
26
91
4
121
Aug
15
45
2
63
Sep
7
20
1
29
Oct
3
5
0
9
Nov
1
4
0
4
Dec
0
0
0
0

Hourly Averages
UTC
Hail
Wind
Torn
Total
00
364
742
61
1167
01
307
600
48
955
02
181
506
24
711
03
147
382
23
552
04
94
347
8
449
05
85
241
15
341
06
78
196
11
285
07
58
177
4
239
08
48
125
5
178
09
35
143
5
183
10
35
129
7
171
11
30
128
4
162
12
24
77
1
102
13
36
67
3
106
14
34
65
3
102
15
51
89
14
154
16
76
125
4
205
17
100
179
11
290
18
169
241
19
429
19
288
366
25
679
20
348
590
60
998
21
397
783
60
1240
22
461
750
80
1291
23
436
807
58
1301

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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