Radar:       Or click here for map
Radar: Philadelphia PA
39.93 N - 74.40W
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
1663
51 18
Wind
7270
201 39
Tornadoes
448
79 9
Total
9381
331 44
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
68
1:139
Sig Severe
N/A
1:3,940
Tornadoes
N/A
1:2,911
F2+ Torn
69
1:16,509
* 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: 577%
10 year report increase: 71%
5 year report increase: 55%

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 19 Jul

Primary Season:
May 08 - 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:
14% at 22 UTC

See hourly table below

Climatological Threat Potential
Threat
Avg Prob of Occurrence
Return Interval
Natl Rank
Any Tornado
0.005%
18482 yrs
N/A
F2+ Tornado
0.002%
47873 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
24
14
92
31
7
5
38
37
1981
2
2
28
14
10
9
22
19
1982
7
5
81
26
7
6
21
27
1983
21
10
137
31
8
5
37
35
1984
14
10
68
25
12
6
38
31
1985
68
8
115
25
13
7
94
28
1986
31
12
65
27
4
4
39
32
1987
46
15
137
33
10
6
66
37
1988
26
11
182
34
14
10
54
39
1989
18
12
309
39
34
10
86
42
1990
36
12
304
37
27
13
90
42
1991
41
14
355
47
11
9
63
47
1992
47
18
312
37
41
12
129
39
1993
46
17
228
40
20
11
86
46
1994
78
28
425
57
42
19
162
60
1995
70
16
402
54
29
14
128
56
1996
61
21
315
46
21
14
103
52
1997
63
18
324
37
8
6
79
43
1998
109
27
390
47
34
13
177
51
1999
45
15
252
39
7
7
59
44
2000
119
23
335
40
11
9
141
46
2001
88
29
335
44
13
6
114
50
2002
148
30
503
47
16
8
180
50
2003
68
19
366
46
14
8
96
53
2004
143
34
354
57
20
9
183
62
2005
50
17
385
48
3
3
56
51
2006
194
36
471
52
12
8
218
60
AVG
62
18
269
39
17
9
347
44


Violent Tornadoes
Date
F
Deaths
Injuries
1989 10-Jul 2145 UTC
F4
0
40

Monthly Averages
Month
Hail
Wind
Torn
Total
Jan
0
5
0
5
Feb
0
2
0
2
Mar
1
4
0
5
Apr
5
12
1
18
May
17
35
2
54
Jun
15
57
3
75
Jul
14
70
5
89
Aug
6
46
2
55
Sep
2
14
1
18
Oct
0
7
1
8
Nov
0
13
1
14
Dec
0
3
0
3

Hourly Averages
UTC
Hail
Wind
Torn
Total
00
163
763
59
985
01
90
555
21
666
02
45
377
21
443
03
32
220
8
260
04
20
132
5
157
05
17
110
5
132
06
9
51
3
63
07
3
41
2
46
08
4
25
3
32
09
7
19
3
29
10
6
28
1
35
11
1
27
4
32
12
4
34
7
45
13
11
41
1
53
14
8
56
3
67
15
13
69
7
89
16
24
139
16
179
17
37
209
14
260
18
94
312
14
420
19
160
486
33
679
20
226
744
43
1013
21
238
955
49
1242
22
241
980
61
1282
23
210
897
65
1172

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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