Radar:       Or click here for map
Radar: Cheyenne WY
41.15 N - 104.80W
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
4990
401 41
Wind
1286
135 26
Tornadoes
1102
57 18
Total
7378
593 57
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
1:177
Sig Severe
59
1:2,199
Tornadoes
26
1:1,184
F2+ Torn
N/A
1:22,881
* 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: 96%
10 year report increase: -38%
5 year report increase: -9%

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:
3.8 on 24 Jun

Primary Season:
May 03 - Sep 06

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 00 UTC

See hourly table below

Climatological Threat Potential
Threat
Avg Prob of Occurrence
Return Interval
Natl Rank
Any Tornado
0.005%
19274 yrs
N/A
F2+ Tornado
0.003%
35055 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
35
19
35
29
29
22
93
49
1981
64
26
45
28
24
13
112
49
1982
119
36
36
22
61
26
241
55
1983
164
31
57
29
28
15
220
48
1984
69
19
28
18
47
23
163
42
1985
81
26
32
21
26
16
133
44
1986
109
32
32
20
17
10
143
45
1987
122
31
26
17
40
19
202
47
1988
66
27
29
22
46
23
158
48
1989
87
30
31
26
20
9
127
49
1990
85
33
41
24
68
30
221
64
1991
214
49
36
19
64
28
342
61
1992
147
46
42
26
57
22
261
62
1993
192
54
64
33
58
24
308
67
1994
148
44
87
37
38
17
224
63
1995
101
27
56
28
31
17
163
51
1996
318
59
95
42
84
25
486
72
1997
195
50
39
25
46
28
287
71
1998
231
54
60
31
46
24
323
71
1999
321
49
49
26
56
20
433
60
2000
245
42
60
29
48
12
341
56
2001
263
55
50
24
27
15
317
64
2002
220
32
21
15
20
8
260
39
2003
286
66
56
26
31
13
348
69
2004
402
51
49
25
55
19
512
62
2005
478
59
61
30
23
14
524
69
2006
228
47
69
25
12
7
252
55
AVG
185
41
48
26
41
18
273
57


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
10
2
1
12
May
31
7
8
45
Jun
64
12
16
92
Jul
41
15
10
66
Aug
29
9
5
43
Sep
9
3
1
13
Oct
1
0
1
2
Nov
0
0
0
0
Dec
0
0
0
0

Hourly Averages
UTC
Hail
Wind
Torn
Total
00
845
209
155
1209
01
641
208
121
970
02
508
127
81
716
03
328
104
48
480
04
159
64
17
240
05
99
31
7
137
06
38
9
5
52
07
28
8
2
38
08
23
11
0
34
09
10
2
0
12
10
2
3
0
5
11
6
1
0
7
12
3
1
0
4
13
3
0
0
3
14
4
4
1
9
15
8
3
0
11
16
3
0
6
9
17
10
0
16
26
18
26
9
16
51
19
90
25
40
155
20
208
45
92
345
21
467
104
143
714
22
636
126
184
946
23
845
192
168
1205

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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