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Radar: Quad Cities (Davenport) IA
41.60 N - 90.57W
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
5809
327 34
Wind
8684
605 42
Tornadoes
1276
171 16
Total
15769
1103 56
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
35
1:83
Sig Severe
22
1:1,182
Tornadoes
14
1:1,022
F2+ Torn
30
1:7,627
* 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: 653%
10 year report increase: 286%
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:
5.6 on 13 May

Primary Season:
Mar 29 - Aug 29

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
0.030%
3323 yrs
32
F2+ Tornado
0.023%
4264 yrs
36
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
78
27
234
40
26
16
130
50
1981
55
20
96
28
38
16
131
42
1982
41
26
133
42
34
16
109
57
1983
23
12
202
35
16
8
55
39
1984
61
27
197
39
38
18
137
51
1985
83
27
125
37
22
14
127
46
1986
60
26
158
40
29
16
118
54
1987
86
24
187
38
30
19
146
47
1988
48
16
171
21
59
11
166
31
1989
72
27
200
27
20
10
112
39
1990
64
21
183
35
56
21
176
46
1991
135
31
259
45
58
26
251
61
1992
118
23
263
39
33
17
184
46
1993
96
29
417
51
46
20
188
61
1994
159
32
247
44
20
10
199
50
1995
160
41
291
45
76
14
312
61
1996
184
32
253
40
45
17
274
57
1997
128
24
434
37
44
13
216
44
1998
240
47
629
53
83
23
406
73
1999
211
35
367
39
53
14
317
47
2000
511
46
522
47
56
18
623
62
2001
337
54
440
54
56
14
449
69
2002
323
50
324
50
24
14
371
71
2003
681
52
533
49
105
19
891
65
2004
435
53
563
54
98
26
631
71
2005
358
55
536
50
33
13
424
72
2006
1062
73
720
64
78
20
1218
87
AVG
215
34
322
42
47
16
584
56


Violent Tornadoes
Date
F
Deaths
Injuries
1981 30-Mar 0030 UTC
F4
0
0
1983 04-Jul 0115 UTC
F4
0
0
1984 07-Jun 2345 UTC
F4
3
64
1984 08-Jun 0541 UTC
F5
9
200
1986 28-Sep 2234 UTC
F4
0
0
1989 24-May 2320 UTC
F4
0
0
1989 31-May 0050 UTC
F4
0
3
1990 13-Mar 2253 UTC
F4
0
0
1990 28-Aug 2030 UTC
F5
29
350
1995 13-May 2255 UTC
F4
0
45
2004 13-Jul 1934 UTC
F4
0
3

Monthly Averages
Month
Hail
Wind
Torn
Total
Jan
0
0
0
1
Feb
1
2
0
3
Mar
18
11
2
31
Apr
43
25
8
76
May
59
44
15
118
Jun
34
79
11
124
Jul
23
75
5
103
Aug
18
50
3
72
Sep
11
20
1
33
Oct
5
5
0
10
Nov
1
4
1
6
Dec
0
1
0
2

Hourly Averages
UTC
Hail
Wind
Torn
Total
00
577
844
152
1573
01
532
681
126
1339
02
441
632
96
1169
03
308
498
63
869
04
197
456
29
682
05
128
297
37
462
06
107
281
17
405
07
104
269
13
386
08
92
264
7
363
09
49
227
3
279
10
56
178
2
236
11
47
108
4
159
12
58
108
1
167
13
55
97
4
156
14
96
82
2
180
15
91
87
2
180
16
114
116
9
239
17
117
139
21
277
18
232
232
28
492
19
257
358
64
679
20
388
456
88
932
21
489
660
142
1291
22
610
773
171
1554
23
664
841
195
1700

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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