Radar:       Or click here for map
Radar: Knoxville (Morristown) TN
36.17 N - 83.40W
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
5799
 191 37
Wind
11209
 550 57
Tornadoes
485
 105 9
Total
17493
 846 66
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
21
1:75
Sig Severe
37
1:1,542
Tornadoes
N/A
1:2,689
F2+ Torn
56
1:12,421
* 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: 1028%
10 year report increase: 174%
5 year report increase: 123%
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:
6.3 on 31 May

Primary Season:
Mar 30 - Aug 26
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:
13% at 22 UTC
See hourly table below

Climatological Threat Potential
Threat
Avg Prob of Occurrence
Return Interval
Natl Rank
Any Tornado
0.030%
3314 yrs
31
F2+ Tornado
0.025%
3956 yrs
28
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
22
8
67
32
17
12
56
41
1981
11
7
52
24
2
2
15
28
1982
44
21
69
29
6
6
56
39
1983
17
11
148
35
15
14
47
40
1984
70
19
145
41
11
6
92
46
1985
142
21
208
43
7
4
156
47
1986
36
19
143
44
5
4
46
53
1987
40
18
150
48
4
4
48
54
1988
59
24
115
41
4
4
67
52
1989
61
26
234
46
20
5
101
55
1990
123
35
298
60
22
11
167
71
1991
58
24
242
48
7
5
72
57
1992
71
30
184
56
12
8
95
64
1993
157
29
268
62
24
13
205
67
1994
125
31
178
48
50
14
225
57
1995
232
46
492
76
31
12
294
91
1996
262
42
465
82
30
11
322
88
1997
302
50
555
59
40
15
382
72
1998
524
64
593
67
38
13
600
81
1999
332
54
486
58
4
3
340
71
2000
247
52
826
71
20
12
287
77
2001
210
43
716
55
7
6
224
62
2002
498
57
824
73
18
5
534
83
2003
576
70
941
89
24
11
624
105
2004
286
48
898
77
34
14
354
86
2005
446
59
698
72
19
12
484
84
2006
848
81
1214
93
14
7
876
107
AVG
215
37
415
57
18
9
648
66


Violent Tornadoes
Date
F
Deaths
Injuries
1989 05-May 2220 UTC
F4
2
35
1989 05-May 2254 UTC
F4
4
52
1994 27-Mar 1814 UTC
F4
3
20
1998 07-May 2149 UTC
F4
0
2

Monthly Averages
Month
Hail
Wind
Torn
Total
Jan
4
9
1
13
Feb
4
10
1
15
Mar
13
12
2
27
Apr
43
34
3
80
May
63
74
4
141
Jun
40
83
3
126
Jul
24
104
1
129
Aug
14
52
1
67
Sep
4
9
1
13
Oct
1
3
0
4
Nov
3
18
1
22
Dec
2
2
0
5

Hourly Averages
UTC
Hail
Wind
Torn
Total
00
497
1078
44
1619
01
347
805
34
1186
02
225
581
30
836
03
203
403
17
623
04
112
394
14
520
05
102
351
12
465
06
72
254
17
343
07
67
213
12
292
08
51
144
8
203
09
63
120
8
191
10
48
118
9
175
11
37
112
5
154
12
36
94
5
135
13
26
110
5
141
14
51
79
4
134
15
45
100
5
150
16
58
122
2
182
17
149
172
11
332
18
285
370
18
673
19
484
684
25
1193
20
650
988
37
1675
21
799
1310
40
2149
22
763
1409
71
2243
23
629
1198
52
1879

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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