Alert archive / Pennsylvania / Severe Thunderstorm Warnings
Severe Thunderstorm Warnings in Pennsylvania, 1986
137 severe thunderstorm warnings in 1986. An alert counts here when it covered any part of the state, so the counties below add up to more than the state. The archive of severe thunderstorm warnings reaches back to 1986.
Severe Thunderstorm Warnings by county
Each county as a circle sized by its count in 1986. Tap one for its archive.
- Severe Thunderstorm Warnings
- 137
- Busiest month
- July55 severe thunderstorm warnings
- Busiest day
- July 20, 198622 severe thunderstorm warnings
Over time
By month
The alerts
Every alert, in the order issued. Times are local, Eastern Time. Each opens its own page with the text, the map, the radar and the sounding.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jan 21, 2:09 PM EST | Severe Thunderstorm Warning | CTP | Cumberland, Perry | 51 min |
| Mar 10, 8:11 PM EST | Severe Thunderstorm Warning | CLE | Lawrence | 49 min |
| Mar 10, 8:23 PM EST | Severe Thunderstorm Warning | PBZ | Allegheny, Butler | 52 min |
| Mar 10, 8:42 PM EST | Severe Thunderstorm Warning | PBZ | Armstrong, Westmoreland | 63 min |
| Mar 10, 8:42 PM EST | Severe Thunderstorm Warning | PBZ | Clarion | 63 min |
| Mar 10, 9:36 PM EST | Severe Thunderstorm Warning | PBZ | Cambria, Somerset, Westmoreland | 84 min |
| Apr 6, 4:20 PM EST | Severe Thunderstorm Warning | CLE | Venango, Warren | 70 min |
| May 6, 5:45 PM EDT | Severe Thunderstorm Warning | CLE | Crawford | 75 min |
| May 6, 5:45 PM EDT | Severe Thunderstorm Warning | CLE | Forest | 75 min |
| May 6, 6:04 PM EDT | Severe Thunderstorm Warning | CLE | Mercer | 26 min |
| May 6, 6:10 PM EDT | Severe Thunderstorm Warning | CLE | Erie | 50 min |
| May 6, 6:25 PM EDT | Severe Thunderstorm Warning | CLE | Cameron, Elk | 65 min |
| May 6, 6:25 PM EDT | Severe Thunderstorm Warning | PBZ | Jefferson | 65 min |
| May 6, 7:00 PM EDT | Severe Thunderstorm Warning | CLE | Crawford, Erie | 60 min |
| May 6, 7:34 PM EDT | Severe Thunderstorm Warning | CLE | Mercer | 116 min |
| May 6, 8:10 PM EDT | Severe Thunderstorm Warning | CLE | Lawrence | 80 min |
| May 17, 5:00 PM EDT | Severe Thunderstorm Warning | PBZ | Butler | 60 min |
| May 30, 3:30 PM EDT | Severe Thunderstorm Warning | PBZ | Washington | 60 min |
| May 31, 6:05 PM EDT | Severe Thunderstorm Warning | CTP | Lycoming | 55 min |
| May 31, 6:40 PM EDT | Severe Thunderstorm Warning | CTP | Tioga | 36 min |
| May 31, 6:55 PM EDT | Severe Thunderstorm Warning | CTP | Lycoming | 65 min |
| May 31, 7:06 PM EDT | Severe Thunderstorm Warning | BGM | Wayne | 84 min |
| May 31, 7:35 PM EDT | Severe Thunderstorm Warning | CTP | Northumberland | 55 min |
| Jun 11, 6:50 PM EDT | Severe Thunderstorm Warning | CTP | Lancaster | 55 min |
| Jun 11, 7:10 PM EDT | Severe Thunderstorm Warning | PBZ | Allegheny, Butler | 50 min |
| Jun 11, 7:27 PM EDT | Severe Thunderstorm Warning | CLE | Mercer | 63 min |
| Jun 11, 7:30 PM EDT | Severe Thunderstorm Warning | CTP | Lancaster, York | 60 min |
| Jun 11, 8:15 PM EDT | Severe Thunderstorm Warning | CTP | Cumberland, Perry | 60 min |
| Jun 15, 6:04 PM EDT | Severe Thunderstorm Warning | CLE | Crawford, Erie | 56 min |
| Jun 16, 7:24 PM EDT | Severe Thunderstorm Warning | CLE | Crawford | 36 min |
| Jun 16, 7:24 PM EDT | Severe Thunderstorm Warning | CLE | Mercer | 66 min |
| Jun 16, 7:28 PM EDT | Severe Thunderstorm Warning | CLE | Venango | 32 min |
| Jun 16, 7:45 PM EDT | Severe Thunderstorm Warning | PBZ | Clarion, Jefferson | 60 min |
| Jun 16, 8:45 PM EDT | Severe Thunderstorm Warning | CTP | Bradford | 60 min |
| Jun 16, 9:50 PM EDT | Severe Thunderstorm Warning | CTP | Bradford | 30 min |
| Jun 27, 6:30 PM EDT | Severe Thunderstorm Warning | PBZ | Greene, Washington | 60 min |
| Jul 8, 11:53 AM EDT | Severe Thunderstorm Warning | PBZ | Allegheny, Butler | 67 min |
| Jul 8, 12:20 PM EDT | Severe Thunderstorm Warning | PBZ | Beaver | 40 min |
| Jul 8, 12:55 PM EDT | Severe Thunderstorm Warning | PBZ | Allegheny, Westmoreland | 65 min |
| Jul 8, 1:47 PM EDT | Severe Thunderstorm Warning | PBZ | Beaver | 43 min |
| Jul 8, 2:14 PM EDT | Severe Thunderstorm Warning | PBZ | Allegheny | 56 min |
| Jul 8, 3:14 PM EDT | Severe Thunderstorm Warning | PBZ | Westmoreland | 56 min |
| Jul 8, 4:14 PM EDT | Severe Thunderstorm Warning | PBZ | Allegheny, Beaver, Washington | 56 min |
| Jul 8, 4:14 PM EDT | Severe Thunderstorm Warning | PBZ | Fayette, Somerset | 56 min |
| Jul 8, 5:25 PM EDT | Severe Thunderstorm Warning | CLE | Venango | 65 min |
| Jul 9, 12:40 AM EDT | Severe Thunderstorm Warning | PBZ | Allegheny, Beaver, Butler | 50 min |
| Jul 17, 6:00 PM EDT | Severe Thunderstorm Warning | PBZ | Greene | 45 min |
| Jul 18, 5:30 PM EDT | Severe Thunderstorm Warning | CTP | Cumberland | 60 min |
| Jul 18, 10:04 PM EDT | Severe Thunderstorm Warning | CLE | McKean, Warren | 86 min |
| Jul 18, 11:23 PM EDT | Severe Thunderstorm Warning | PBZ | Clearfield, Jefferson | 57 min |
| Jul 18, 11:44 PM EDT | Severe Thunderstorm Warning | CLE | Crawford, Erie | 76 min |
| Jul 19, 12:02 AM EDT | Severe Thunderstorm Warning | CLE | Warren | 58 min |
| Jul 19, 12:45 AM EDT | Severe Thunderstorm Warning | PBZ | Cambria | 60 min |
| Jul 19, 1:58 AM EDT | Severe Thunderstorm Warning | PHI | Delaware, Montgomery, Philadelphia | 32 min |
| Jul 19, 2:05 PM EDT | Severe Thunderstorm Warning | PBZ | Somerset, Westmoreland | 55 min |
| Jul 19, 2:05 PM EDT | Severe Thunderstorm Warning | PBZ | Armstrong, Indiana | 55 min |
| Jul 19, 3:00 PM EDT | Severe Thunderstorm Warning | PBZ | Fayette, Somerset | 60 min |
| Jul 20, 10:38 AM EDT | Severe Thunderstorm Warning | CLE | Warren | 82 min |
| Jul 20, 12:03 PM EDT | Severe Thunderstorm Warning | CLE | McKean, Warren | 57 min |
| Jul 20, 12:12 PM EDT | Severe Thunderstorm Warning | CLE | Venango | 78 min |
| Jul 20, 12:47 PM EDT | Severe Thunderstorm Warning | CLE | Forest | 58 min |
| Jul 20, 1:13 PM EDT | Severe Thunderstorm Warning | PBZ | Clarion | 2 hr |
| Jul 20, 1:38 PM EDT | Severe Thunderstorm Warning | CLE | Cameron, Elk, McKean | 52 min |
| Jul 20, 1:38 PM EDT | Severe Thunderstorm Warning | CLE | Forest, Venango, Warren | 52 min |
| Jul 20, 1:40 PM EDT | Severe Thunderstorm Warning | PBZ | Jefferson | 110 min |
| Jul 20, 1:58 PM EDT | Severe Thunderstorm Warning | PBZ | Clearfield | 62 min |
| Jul 20, 1:58 PM EDT | Severe Thunderstorm Warning | PBZ | Beaver, Butler | 62 min |
| Jul 20, 2:40 PM EDT | Severe Thunderstorm Warning | PBZ | Clearfield, Indiana | 80 min |
| Jul 20, 2:40 PM EDT | Severe Thunderstorm Warning | PBZ | Armstrong | 80 min |
| Jul 20, 3:10 PM EDT | Severe Thunderstorm Warning | PBZ | Allegheny | 50 min |
| Jul 20, 3:40 PM EDT | Severe Thunderstorm Warning | PBZ | Washington, Westmoreland | 80 min |
| Jul 20, 3:40 PM EDT | Severe Thunderstorm Warning | PBZ | Indiana | 80 min |
| Jul 20, 3:40 PM EDT | Severe Thunderstorm Warning | PBZ | Blair | 80 min |
| Jul 20, 3:40 PM EDT | Severe Thunderstorm Warning | PBZ | Cambria | 110 min |
| Jul 20, 4:26 PM EDT | Severe Thunderstorm Warning | PBZ | Fayette, Greene | 94 min |
| Jul 20, 4:26 PM EDT | Severe Thunderstorm Warning | PBZ | Westmoreland | 94 min |
| Jul 20, 4:55 PM EDT | Severe Thunderstorm Warning | PBZ | Allegheny | 65 min |
| Jul 20, 4:55 PM EDT | Severe Thunderstorm Warning | PBZ | Bedford, Blair | 95 min |
| Jul 20, 4:55 PM EDT | Severe Thunderstorm Warning | PBZ | Somerset | 95 min |
| Jul 26, 8:49 PM EDT | Severe Thunderstorm Warning | CTP | Berks | 56 min |
| Jul 28, 10:12 PM EDT | Severe Thunderstorm Warning | CLE | Mercer | 63 min |
| Jul 28, 11:05 PM EDT | Severe Thunderstorm Warning | PBZ | Beaver | 70 min |
| Jul 29, 1:00 AM EDT | Severe Thunderstorm Warning | PBZ | Greene | 2 hr |
| Jul 29, 1:00 AM EDT | Severe Thunderstorm Warning | PBZ | Greene | 60 min |
| Jul 29, 1:00 AM EDT | Severe Thunderstorm Warning | PBZ | Allegheny | 60 min |
| Jul 29, 2:00 AM EDT | Severe Thunderstorm Warning | PBZ | Allegheny, Washington, Westmoreland | 60 min |
| Jul 29, 2:00 AM EDT | Severe Thunderstorm Warning | PBZ | Greene | 60 min |
| Jul 29, 2:30 AM EDT | Severe Thunderstorm Warning | PBZ | Fayette, Westmoreland | 60 min |
| Jul 29, 1:15 PM EDT | Severe Thunderstorm Warning | CTP | Dauphin | 30 min |
| Jul 29, 2:45 PM EDT | Severe Thunderstorm Warning | CTP | Northampton | 15 min |
| Jul 29, 3:45 PM EDT | Severe Thunderstorm Warning | CTP | Dauphin | 45 min |
| Aug 1, 4:46 PM EDT | Severe Thunderstorm Warning | CLE | Venango | 59 min |
| Aug 2, 2:15 PM EDT | Severe Thunderstorm Warning | CTP | Berks, Lehigh | 45 min |
| Aug 2, 2:53 PM EDT | Severe Thunderstorm Warning | CTP | Berks, Lehigh | 67 min |
| Aug 2, 3:04 PM EDT | Severe Thunderstorm Warning | PHI | Montgomery | 41 min |
| Aug 2, 3:41 PM EDT | Severe Thunderstorm Warning | CTP | Northampton | 64 min |
| Aug 2, 7:53 PM EDT | Severe Thunderstorm Warning | CLE | Crawford | 67 min |
| Aug 5, 5:00 PM EDT | Severe Thunderstorm Warning | CTP | Lancaster, York | 60 min |
| Aug 5, 5:30 PM EDT | Severe Thunderstorm Warning | CTP | Perry | 30 min |
| Aug 5, 5:55 PM EDT | Severe Thunderstorm Warning | CTP | Cumberland, Dauphin | 65 min |
| Aug 6, 2:50 PM EDT | Severe Thunderstorm Warning | PBZ | Beaver | 70 min |
| Aug 6, 3:00 PM EDT | Severe Thunderstorm Warning | CTP | Juniata | 60 min |
| Aug 6, 3:21 PM EDT | Severe Thunderstorm Warning | CLE | Lawrence | 54 min |
| Aug 6, 3:35 PM EDT | Severe Thunderstorm Warning | PBZ | Allegheny | 55 min |
| Aug 6, 4:28 PM EDT | Severe Thunderstorm Warning | PBZ | Allegheny | 62 min |
| Aug 6, 5:30 PM EDT | Severe Thunderstorm Warning | PBZ | Allegheny, Westmoreland | 60 min |
| Aug 6, 6:30 PM EDT | Severe Thunderstorm Warning | PBZ | Westmoreland | 60 min |
| Aug 7, 3:25 PM EDT | Severe Thunderstorm Warning | CTP | Juniata | 35 min |
| Aug 7, 3:31 PM EDT | Severe Thunderstorm Warning | PBZ | Armstrong, Westmoreland | 59 min |
| Aug 7, 3:55 PM EDT | Severe Thunderstorm Warning | CTP | Perry | 65 min |
| Aug 7, 4:18 PM EDT | Severe Thunderstorm Warning | PBZ | Indiana, Jefferson | 62 min |
| Aug 7, 4:35 PM EDT | Severe Thunderstorm Warning | CTP | Dauphin | 55 min |
| Aug 7, 4:42 PM EDT | Severe Thunderstorm Warning | PBZ | Clearfield, Elk | 78 min |
| Aug 7, 5:30 PM EDT | Severe Thunderstorm Warning | CTP | Dauphin | 30 min |
| Aug 7, 5:45 PM EDT | Severe Thunderstorm Warning | CTP | Bradford | 30 min |
| Aug 7, 6:00 PM EDT | Severe Thunderstorm Warning | CTP | Lebanon | 60 min |
| Aug 7, 6:25 PM EDT | Severe Thunderstorm Warning | CTP | Lancaster | 65 min |
| Aug 7, 6:35 PM EDT | Severe Thunderstorm Warning | CTP | Dauphin | 55 min |
| Aug 15, 3:00 PM EDT | Severe Thunderstorm Warning | PBZ | Butler | 60 min |
| Aug 15, 9:21 PM EDT | Severe Thunderstorm Warning | CLE | Crawford, Erie, Venango, Warren | 69 min |
| Aug 16, 12:20 AM EDT | Severe Thunderstorm Warning | PBZ | Butler | 70 min |
| Aug 16, 6:35 PM EDT | Severe Thunderstorm Warning | CTP | Dauphin | 55 min |
| Aug 23, 4:00 PM EDT | Severe Thunderstorm Warning | PBZ | Allegheny, Butler | 60 min |
| Aug 23, 4:30 PM EDT | Severe Thunderstorm Warning | PBZ | Armstrong, Westmoreland | 60 min |
| Aug 23, 5:10 PM EDT | Severe Thunderstorm Warning | PBZ | Clearfield | 60 min |
| Sep 23, 4:21 PM EDT | Severe Thunderstorm Warning | PHI | Bucks | 29 min |
| Sep 26, 8:35 AM EDT | Severe Thunderstorm Warning | CLE | Erie | 55 min |
| Sep 26, 1:17 PM EDT | Severe Thunderstorm Warning | CLE | Erie | 58 min |
| Sep 26, 4:25 PM EDT | Severe Thunderstorm Warning | PBZ | Clarion, Jefferson | 70 min |
| Sep 26, 4:52 PM EDT | Severe Thunderstorm Warning | PBZ | Clearfield | 68 min |
| Sep 26, 7:24 PM EDT | Severe Thunderstorm Warning | PBZ | Armstrong | 66 min |
| Sep 30, 2:40 PM EDT | Severe Thunderstorm Warning | CLE | Erie | 65 min |
| Sep 30, 3:27 PM EDT | Severe Thunderstorm Warning | CLE | Crawford | 63 min |
| Sep 30, 5:12 PM EDT | Severe Thunderstorm Warning | CLE | Crawford | 33 min |
| Sep 30, 5:32 PM EDT | Severe Thunderstorm Warning | CLE | Lawrence | 58 min |
| Sep 30, 5:58 PM EDT | Severe Thunderstorm Warning | PBZ | Beaver | 42 min |
| Oct 1, 3:10 PM EDT | Severe Thunderstorm Warning | PBZ | Washington | 60 min |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Allegheny County15
- Westmoreland County13
- Butler County9
- Crawford County9
- Erie County8
- Beaver County8
- Venango County7
- Warren County7
- Dauphin County7
- Armstrong County6
- Jefferson County6
- Washington County6
- Greene County6
- Clearfield County6
- Somerset County5
- Mercer County5
- Cumberland County4
- Perry County4
- Lawrence County4
- Clarion County4
- Lancaster County4
- Fayette County4
- Indiana County4
- Cambria County3
- Forest County3
- Elk County3
- Bradford County3
- McKean County3
- Berks County3
- Cameron County2
- Lycoming County2
- York County2
- Montgomery County2
- Blair County2
- Northampton County2
- Lehigh County2
- Juniata County2
- Tioga County1
- Wayne County1
- Northumberland County1
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Sources
National Weather Service watches, warnings, advisories and statements from the Iowa Environmental Mesonet's VTEC archive, which reconstructs tornado, severe thunderstorm, flash flood and marine warnings back to 1986 from the NWS text archive. Storm Prediction Center watches and mesoscale discussions from SPC's archive through the Mesonet. County centers from the US Census Bureau. Warning verification from the Mesonet's Cow. Rebuilt daily.