Alert archive / Pennsylvania / Severe Thunderstorm Warnings
Severe Thunderstorm Warnings in Pennsylvania, 1990
254 severe thunderstorm warnings in 1990. 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 1990. Tap one for its archive.
- Severe Thunderstorm Warnings
- 254
- Busiest month
- June73 severe thunderstorm warnings
- Busiest day
- July 9, 199020 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 25, 4:59 PM EST | Severe Thunderstorm Warning | PBZ | Butler | 61 min |
| Feb 16, 3:01 PM EST | Severe Thunderstorm Warning | CLE | Crawford | 59 min |
| Feb 16, 3:22 PM EST | Severe Thunderstorm Warning | CLE | Erie | 53 min |
| Feb 16, 4:15 PM EST | Severe Thunderstorm Warning | PBZ | Beaver, Butler | 60 min |
| Feb 16, 4:23 PM EST | Severe Thunderstorm Warning | CLE | Venango | 37 min |
| Feb 16, 5:10 PM EST | Severe Thunderstorm Warning | PBZ | Armstrong | 65 min |
| Feb 16, 5:27 PM EST | Severe Thunderstorm Warning | PBZ | Westmoreland | 63 min |
| Feb 16, 5:48 PM EST | Severe Thunderstorm Warning | PBZ | Washington | 49 min |
| Feb 16, 5:48 PM EST | Severe Thunderstorm Warning | PBZ | Indiana | 49 min |
| Feb 16, 6:37 PM EST | Severe Thunderstorm Warning | PBZ | Clearfield, Jefferson | 53 min |
| Feb 16, 6:48 PM EST | Severe Thunderstorm Warning | CTP | Clinton | 42 min |
| Feb 16, 7:00 PM EST | Severe Thunderstorm Warning | CTP | Tioga | 60 min |
| Apr 1, 4:49 PM EDT | Severe Thunderstorm Warning | PBZ | Washington | 56 min |
| Apr 1, 5:18 PM EDT | Severe Thunderstorm Warning | PBZ | Bedford, Somerset | 62 min |
| Apr 1, 6:20 PM EDT | Severe Thunderstorm Warning | PBZ | Greene, Washington | 70 min |
| Apr 25, 4:00 PM EDT | Severe Thunderstorm Warning | CTP | Lycoming | 60 min |
| May 13, 7:36 PM EDT | Severe Thunderstorm Warning | CTP | Dauphin, Lancaster, Lebanon | 54 min |
| May 15, 3:58 PM EDT | Severe Thunderstorm Warning | PBZ | Armstrong | 62 min |
| May 15, 6:02 PM EDT | Severe Thunderstorm Warning | PBZ | Clarion | 58 min |
| May 16, 5:46 PM EDT | Severe Thunderstorm Warning | PBZ | Fayette, Greene | 74 min |
| May 17, 2:07 PM EDT | Severe Thunderstorm Warning | CTP | Tioga | 38 min |
| May 17, 2:22 PM EDT | Severe Thunderstorm Warning | CTP | Lycoming | 38 min |
| May 17, 2:52 PM EDT | Severe Thunderstorm Warning | CTP | Sullivan | 38 min |
| May 17, 2:55 PM EDT | Severe Thunderstorm Warning | CTP | Lycoming | 35 min |
| Jun 3, 8:44 PM EDT | Severe Thunderstorm Warning | CLE | Mercer | 61 min |
| Jun 3, 10:48 PM EDT | Severe Thunderstorm Warning | PBZ | Washington | 72 min |
| Jun 3, 10:59 PM EDT | Severe Thunderstorm Warning | PBZ | Armstrong | 61 min |
| Jun 6, 8:22 PM EDT | Severe Thunderstorm Warning | PBZ | Washington | 68 min |
| Jun 8, 7:14 AM EDT | Severe Thunderstorm Warning | PBZ | Beaver | 61 min |
| Jun 8, 7:25 AM EDT | Severe Thunderstorm Warning | PBZ | Allegheny | 65 min |
| Jun 8, 7:49 AM EDT | Severe Thunderstorm Warning | PBZ | Greene, Washington | 56 min |
| Jun 8, 9:05 AM EDT | Severe Thunderstorm Warning | PBZ | Cambria, Somerset | 55 min |
| Jun 8, 3:40 PM EDT | Severe Thunderstorm Warning | PBZ | Fayette, Somerset | 65 min |
| Jun 8, 4:13 PM EDT | Severe Thunderstorm Warning | CTP | Cumberland | 62 min |
| Jun 8, 4:58 PM EDT | Severe Thunderstorm Warning | CTP | Adams, York | 47 min |
| Jun 8, 5:27 PM EDT | Severe Thunderstorm Warning | CTP | Adams, York | 48 min |
| Jun 8, 11:21 PM EDT | Severe Thunderstorm Warning | PBZ | Allegheny, Armstrong, Butler | 2 hr |
| Jun 9, 12:10 AM EDT | Severe Thunderstorm Warning | PBZ | Clearfield, Indiana | 80 min |
| Jun 9, 12:50 AM EDT | Severe Thunderstorm Warning | PHI | Chester, Delaware, Philadelphia | 3 hr |
| Jun 9, 2:33 AM EDT | Severe Thunderstorm Warning | PHI | Montgomery | 57 min |
| Jun 9, 6:00 AM EDT | Severe Thunderstorm Warning | PBZ | Washington | 60 min |
| Jun 9, 6:15 AM EDT | Severe Thunderstorm Warning | PBZ | Allegheny, Beaver, Butler | 60 min |
| Jun 9, 6:26 AM EDT | Severe Thunderstorm Warning | PBZ | Westmoreland | 64 min |
| Jun 9, 6:46 AM EDT | Severe Thunderstorm Warning | CLE | Forest | 44 min |
| Jun 9, 7:51 AM EDT | Severe Thunderstorm Warning | PBZ | Cambria, Somerset | 39 min |
| Jun 14, 7:08 PM EDT | Severe Thunderstorm Warning | PBZ | Washington | 67 min |
| Jun 14, 7:33 PM EDT | Severe Thunderstorm Warning | PBZ | Washington | 57 min |
| Jun 14, 7:43 PM EDT | Severe Thunderstorm Warning | PBZ | Beaver | 62 min |
| Jun 14, 7:56 PM EDT | Severe Thunderstorm Warning | PBZ | Allegheny | 64 min |
| Jun 18, 5:54 AM EDT | Severe Thunderstorm Warning | CLE | Erie | 66 min |
| Jun 18, 6:53 AM EDT | Severe Thunderstorm Warning | CLE | Erie | 82 min |
| Jun 18, 7:04 AM EDT | Severe Thunderstorm Warning | PBZ | Allegheny | 56 min |
| Jun 18, 9:08 AM EDT | Severe Thunderstorm Warning | CLE | McKean | 67 min |
| Jun 18, 11:00 AM EDT | Severe Thunderstorm Warning | CTP | Tioga | 30 min |
| Jun 18, 11:14 AM EDT | Severe Thunderstorm Warning | CLE | Potter | 61 min |
| Jun 18, 11:25 AM EDT | Severe Thunderstorm Warning | CTP | Bradford | 60 min |
| Jun 18, 11:30 AM EDT | Severe Thunderstorm Warning | CTP | Tioga | 60 min |
| Jun 18, 12:20 PM EDT | Severe Thunderstorm Warning | BGM | Susquehanna | 85 min |
| Jun 18, 12:56 PM EDT | Severe Thunderstorm Warning | BGM | Wayne | 64 min |
| Jun 18, 3:33 PM EDT | Severe Thunderstorm Warning | CTP | Adams | 57 min |
| Jun 18, 3:44 PM EDT | Severe Thunderstorm Warning | CTP | Monroe, Northampton | 76 min |
| Jun 18, 3:44 PM EDT | Severe Thunderstorm Warning | CTP | Pike | 76 min |
| Jun 18, 3:53 PM EDT | Severe Thunderstorm Warning | CTP | Northumberland | 67 min |
| Jun 18, 4:24 PM EDT | Severe Thunderstorm Warning | CTP | Carbon | 53 min |
| Jun 18, 4:24 PM EDT | Severe Thunderstorm Warning | CTP | Lehigh, Northampton | 51 min |
| Jun 18, 4:24 PM EDT | Severe Thunderstorm Warning | CTP | Schuylkill | 51 min |
| Jun 19, 2:57 PM EDT | Severe Thunderstorm Warning | PHI | Bucks | 33 min |
| Jun 22, 10:38 PM EDT | Severe Thunderstorm Warning | PBZ | Greene, Washington | 52 min |
| Jun 27, 3:45 PM EDT | Severe Thunderstorm Warning | PHI | Delaware, Philadelphia | 45 min |
| Jun 29, 3:13 PM EDT | Severe Thunderstorm Warning | CLE | Crawford | 62 min |
| Jun 29, 4:51 PM EDT | Severe Thunderstorm Warning | CLE | Cameron, Elk | 69 min |
| Jun 29, 5:40 PM EDT | Severe Thunderstorm Warning | CTP | Clinton | 35 min |
| Jun 29, 6:00 PM EDT | Severe Thunderstorm Warning | PBZ | Fayette, Washington | 60 min |
| Jun 29, 6:10 PM EDT | Severe Thunderstorm Warning | PBZ | Armstrong, Butler | 65 min |
| Jun 29, 6:45 PM EDT | Severe Thunderstorm Warning | PBZ | Fayette, Somerset | 75 min |
| Jun 29, 6:45 PM EDT | Severe Thunderstorm Warning | PBZ | Indiana, Jefferson | 75 min |
| Jun 29, 7:30 PM EDT | Severe Thunderstorm Warning | PBZ | Blair, Cambria | 60 min |
| Jun 29, 7:51 PM EDT | Severe Thunderstorm Warning | CTP | Centre, Huntingdon, Mifflin | 39 min |
| Jun 30, 4:49 PM EDT | Severe Thunderstorm Warning | PBZ | Allegheny, Beaver | 56 min |
| Jun 30, 5:21 PM EDT | Severe Thunderstorm Warning | CTP | Adams, Cumberland, York | 2 hr |
| Jun 30, 5:21 PM EDT | Severe Thunderstorm Warning | CTP | Franklin | 2 hr |
| Jun 30, 5:26 PM EDT | Severe Thunderstorm Warning | PBZ | Somerset, Westmoreland | 64 min |
| Jun 30, 5:26 PM EDT | Severe Thunderstorm Warning | PBZ | Butler | 64 min |
| Jun 30, 5:40 PM EDT | Severe Thunderstorm Warning | PBZ | Allegheny, Armstrong | 50 min |
| Jun 30, 6:20 PM EDT | Severe Thunderstorm Warning | PBZ | Allegheny, Armstrong, Indiana, Westmoreland | 55 min |
| Jun 30, 6:20 PM EDT | Severe Thunderstorm Warning | PBZ | Bedford, Cambria, Somerset | 55 min |
| Jun 30, 6:40 PM EDT | Severe Thunderstorm Warning | PBZ | Fayette, Washington | 65 min |
| Jun 30, 7:03 PM EDT | Severe Thunderstorm Warning | PBZ | Clearfield | 57 min |
| Jun 30, 7:15 PM EDT | Severe Thunderstorm Warning | CTP | Bradford | 20 min |
| Jun 30, 7:19 PM EDT | Severe Thunderstorm Warning | PBZ | Armstrong, Westmoreland | 41 min |
| Jun 30, 7:19 PM EDT | Severe Thunderstorm Warning | PBZ | Bedford, Cambria | 41 min |
| Jun 30, 7:27 PM EDT | Severe Thunderstorm Warning | BGM | Wyoming | 93 min |
| Jun 30, 7:27 PM EDT | Severe Thunderstorm Warning | CLE | Erie | 63 min |
| Jun 30, 7:30 PM EDT | Severe Thunderstorm Warning | CLE | Mercer | 60 min |
| Jun 30, 7:42 PM EDT | Severe Thunderstorm Warning | CLE | Lawrence | 48 min |
| Jun 30, 7:42 PM EDT | Severe Thunderstorm Warning | CTP | Franklin, Fulton, Huntingdon | 63 min |
| Jun 30, 7:42 PM EDT | Severe Thunderstorm Warning | CTP | Centre | 63 min |
| Jun 30, 8:04 PM EDT | Severe Thunderstorm Warning | BGM | Lackawanna, Luzerne | 56 min |
| Jun 30, 8:18 PM EDT | Severe Thunderstorm Warning | CTP | Bradford | 62 min |
| Jun 30, 8:36 PM EDT | Severe Thunderstorm Warning | CLE | Crawford | 69 min |
| Jun 30, 8:51 PM EDT | Severe Thunderstorm Warning | CTP | Centre, Juniata, Mifflin, Snyder, Union | 69 min |
| Jun 30, 8:51 PM EDT | Severe Thunderstorm Warning | CTP | Perry | 69 min |
| Jun 30, 9:18 PM EDT | Severe Thunderstorm Warning | BGM | Wyoming | 87 min |
| Jun 30, 9:27 PM EDT | Severe Thunderstorm Warning | CLE | Venango | 63 min |
| Jun 30, 9:36 PM EDT | Severe Thunderstorm Warning | PBZ | Clarion | 69 min |
| Jun 30, 9:50 PM EDT | Severe Thunderstorm Warning | BGM | Lackawanna, Luzerne | 55 min |
| Jun 30, 9:50 PM EDT | Severe Thunderstorm Warning | BGM | Wayne | 55 min |
| Jun 30, 10:19 PM EDT | Severe Thunderstorm Warning | CTP | Monroe | 41 min |
| Jun 30, 10:44 PM EDT | Severe Thunderstorm Warning | CTP | Cumberland, Perry | 61 min |
| Jun 30, 10:44 PM EDT | Severe Thunderstorm Warning | CTP | Huntingdon | 61 min |
| Jun 30, 10:45 PM EDT | Severe Thunderstorm Warning | PBZ | Clearfield, Indiana | 60 min |
| Jul 1, 11:27 AM EDT | Severe Thunderstorm Warning | PBZ | Fayette | 63 min |
| Jul 5, 12:10 AM EDT | Severe Thunderstorm Warning | CLE | Erie, Warren | 65 min |
| Jul 5, 11:59 AM EDT | Severe Thunderstorm Warning | PBZ | Washington | 61 min |
| Jul 5, 12:14 PM EDT | Severe Thunderstorm Warning | PBZ | Cambria, Indiana | 61 min |
| Jul 5, 12:32 PM EDT | Severe Thunderstorm Warning | PBZ | Fayette | 58 min |
| Jul 5, 12:59 PM EDT | Severe Thunderstorm Warning | PBZ | Blair, Cambria, Westmoreland | 61 min |
| Jul 5, 12:59 PM EDT | Severe Thunderstorm Warning | PBZ | Washington | 61 min |
| Jul 5, 1:32 PM EDT | Severe Thunderstorm Warning | PBZ | Bedford, Somerset | 58 min |
| Jul 5, 1:32 PM EDT | Severe Thunderstorm Warning | PBZ | Fayette | 58 min |
| Jul 5, 2:05 PM EDT | Severe Thunderstorm Warning | CTP | Schuylkill | 25 min |
| Jul 5, 2:26 PM EDT | Severe Thunderstorm Warning | CTP | Cumberland | 34 min |
| Jul 5, 2:28 PM EDT | Severe Thunderstorm Warning | CTP | Lehigh | 62 min |
| Jul 5, 2:34 PM EDT | Severe Thunderstorm Warning | PBZ | Somerset | 56 min |
| Jul 5, 3:01 PM EDT | Severe Thunderstorm Warning | PHI | Bucks | 59 min |
| Jul 5, 3:16 PM EDT | Severe Thunderstorm Warning | CTP | York | 29 min |
| Jul 5, 8:12 PM EDT | Severe Thunderstorm Warning | PBZ | Fayette, Greene, Washington | 73 min |
| Jul 9, 12:48 PM EDT | Severe Thunderstorm Warning | CLE | Venango | 57 min |
| Jul 9, 12:54 PM EDT | Severe Thunderstorm Warning | PBZ | Clarion, Jefferson | 2 hr |
| Jul 9, 1:21 PM EDT | Severe Thunderstorm Warning | PBZ | Clearfield | 99 min |
| Jul 9, 1:21 PM EDT | Severe Thunderstorm Warning | PBZ | Armstrong | 99 min |
| Jul 9, 1:34 PM EDT | Severe Thunderstorm Warning | CTP | Centre | 41 min |
| Jul 9, 1:35 PM EDT | Severe Thunderstorm Warning | PBZ | Beaver, Butler | 85 min |
| Jul 9, 1:40 PM EDT | Severe Thunderstorm Warning | CLE | Lawrence | 50 min |
| Jul 9, 1:50 PM EDT | Severe Thunderstorm Warning | CLE | Venango | 70 min |
| Jul 9, 2:04 PM EDT | Severe Thunderstorm Warning | CTP | Centre, Union | 56 min |
| Jul 9, 2:04 PM EDT | Severe Thunderstorm Warning | CTP | Snyder | 56 min |
| Jul 9, 2:09 PM EDT | Severe Thunderstorm Warning | PBZ | Allegheny | 81 min |
| Jul 9, 2:42 PM EDT | Severe Thunderstorm Warning | CTP | Centre, Mifflin, Snyder, Union | 48 min |
| Jul 9, 3:01 PM EDT | Severe Thunderstorm Warning | PBZ | Allegheny, Beaver | 89 min |
| Jul 9, 3:09 PM EDT | Severe Thunderstorm Warning | CTP | Carbon, Monroe, Northampton | 66 min |
| Jul 9, 3:45 PM EDT | Severe Thunderstorm Warning | PHI | Bucks | 60 min |
| Jul 9, 3:50 PM EDT | Severe Thunderstorm Warning | PBZ | Washington, Westmoreland | 100 min |
| Jul 9, 4:07 PM EDT | Severe Thunderstorm Warning | CTP | Northampton | 38 min |
| Jul 9, 4:31 PM EDT | Severe Thunderstorm Warning | CTP | Lancaster, York | 44 min |
| Jul 9, 4:57 PM EDT | Severe Thunderstorm Warning | PBZ | Somerset | 48 min |
| Jul 9, 5:19 PM EDT | Severe Thunderstorm Warning | PHI | Bucks, Chester, Delaware, Montgomery, Philadelphia | 56 min |
| Jul 10, 3:40 PM EDT | Severe Thunderstorm Warning | PBZ | Butler | 65 min |
| Jul 20, 2:12 PM EDT | Severe Thunderstorm Warning | PBZ | Armstrong, Butler, Clarion | 63 min |
| Jul 20, 2:55 PM EDT | Severe Thunderstorm Warning | PBZ | Westmoreland | 65 min |
| Jul 20, 4:12 PM EDT | Severe Thunderstorm Warning | PBZ | Cambria | 63 min |
| Jul 20, 4:12 PM EDT | Severe Thunderstorm Warning | PBZ | Greene | 63 min |
| Jul 20, 4:15 PM EDT | Severe Thunderstorm Warning | CTP | Lycoming | 60 min |
| Jul 20, 4:24 PM EDT | Severe Thunderstorm Warning | PBZ | Somerset | 66 min |
| Jul 20, 5:01 PM EDT | Severe Thunderstorm Warning | PBZ | Fayette, Somerset | 119 min |
| Jul 22, 5:32 PM EDT | Severe Thunderstorm Warning | CLE | Mercer | 58 min |
| Jul 22, 6:11 PM EDT | Severe Thunderstorm Warning | CLE | Lawrence | 64 min |
| Jul 22, 7:24 PM EDT | Severe Thunderstorm Warning | PBZ | Clarion | 66 min |
| Jul 22, 8:02 PM EDT | Severe Thunderstorm Warning | PBZ | Beaver | 58 min |
| Jul 22, 8:31 PM EDT | Severe Thunderstorm Warning | PBZ | Washington | 59 min |
| Jul 22, 9:01 PM EDT | Severe Thunderstorm Warning | PBZ | Beaver | 59 min |
| Aug 13, 3:13 PM EDT | Severe Thunderstorm Warning | CTP | Bradford | 47 min |
| Aug 13, 3:25 PM EDT | Severe Thunderstorm Warning | CTP | Lycoming | 35 min |
| Aug 13, 3:47 PM EDT | Severe Thunderstorm Warning | CTP | Sullivan | 43 min |
| Aug 13, 5:35 PM EDT | Severe Thunderstorm Warning | BGM | Wayne | 55 min |
| Aug 13, 6:54 PM EDT | Severe Thunderstorm Warning | CTP | Berks | 66 min |
| Aug 13, 6:54 PM EDT | Severe Thunderstorm Warning | CTP | Carbon | 66 min |
| Aug 13, 7:21 PM EDT | Severe Thunderstorm Warning | CTP | Lancaster | 39 min |
| Aug 13, 7:23 PM EDT | Severe Thunderstorm Warning | CTP | Berks, Lehigh | 52 min |
| Aug 13, 7:23 PM EDT | Severe Thunderstorm Warning | CTP | Carbon, Northampton | 52 min |
| Aug 13, 7:29 PM EDT | Severe Thunderstorm Warning | PHI | Chester, Montgomery | 61 min |
| Aug 13, 7:57 PM EDT | Severe Thunderstorm Warning | CTP | Lehigh, Northampton | 48 min |
| Aug 13, 8:05 PM EDT | Severe Thunderstorm Warning | PHI | Delaware, Philadelphia | 40 min |
| Aug 13, 8:24 PM EDT | Severe Thunderstorm Warning | PHI | Bucks | 51 min |
| Aug 19, 5:59 PM EDT | Severe Thunderstorm Warning | PBZ | Greene | 61 min |
| Aug 19, 6:54 PM EDT | Severe Thunderstorm Warning | PBZ | Beaver | 66 min |
| Aug 19, 6:54 PM EDT | Severe Thunderstorm Warning | PBZ | Allegheny | 3 hr |
| Aug 19, 7:40 PM EDT | Severe Thunderstorm Warning | PBZ | Cambria | 80 min |
| Aug 27, 6:00 PM EDT | Severe Thunderstorm Warning | PHI | Bucks | 45 min |
| Aug 27, 6:34 PM EDT | Severe Thunderstorm Warning | PHI | Montgomery, Philadelphia | 116 min |
| Aug 28, 2:46 AM EDT | Severe Thunderstorm Warning | PBZ | Clearfield, Jefferson | 59 min |
| Aug 28, 3:40 AM EDT | Severe Thunderstorm Warning | PBZ | Cambria, Indiana | 65 min |
| Aug 28, 3:44 AM EDT | Severe Thunderstorm Warning | CTP | Tioga | 46 min |
| Aug 28, 3:44 AM EDT | Severe Thunderstorm Warning | CTP | Clinton | 46 min |
| Aug 28, 3:56 AM EDT | Severe Thunderstorm Warning | CTP | Lycoming | 64 min |
| Aug 28, 7:44 PM EDT | Severe Thunderstorm Warning | CLE | Forest, Venango, Warren | 61 min |
| Aug 28, 7:54 PM EDT | Severe Thunderstorm Warning | CLE | Crawford | 66 min |
| Aug 28, 8:16 PM EDT | Severe Thunderstorm Warning | PBZ | Clarion, Jefferson | 59 min |
| Aug 28, 8:20 PM EDT | Severe Thunderstorm Warning | CLE | Crawford, Erie, Venango, Warren | 70 min |
| Aug 28, 8:20 PM EDT | Severe Thunderstorm Warning | CLE | Cameron, Elk, Forest, McKean, Potter | 70 min |
| Aug 28, 8:25 PM EDT | Severe Thunderstorm Warning | CTP | Tioga | 50 min |
| Aug 28, 9:03 PM EDT | Severe Thunderstorm Warning | CTP | Clinton, Lycoming | 60 min |
| Aug 28, 9:31 PM EDT | Severe Thunderstorm Warning | CLE | Crawford, Venango | 59 min |
| Aug 28, 9:33 PM EDT | Severe Thunderstorm Warning | CLE | Mercer | 57 min |
| Aug 28, 10:05 PM EDT | Severe Thunderstorm Warning | CTP | Centre, Union | 55 min |
| Aug 28, 10:19 PM EDT | Severe Thunderstorm Warning | PBZ | Armstrong, Butler | 56 min |
| Aug 28, 10:26 PM EDT | Severe Thunderstorm Warning | CLE | Mercer | 34 min |
| Aug 28, 10:32 PM EDT | Severe Thunderstorm Warning | BGM | Lackawanna, Luzerne | 58 min |
| Aug 28, 10:38 PM EDT | Severe Thunderstorm Warning | PBZ | Indiana | 67 min |
| Aug 28, 11:12 PM EDT | Severe Thunderstorm Warning | PBZ | Cambria, Somerset, Westmoreland | 63 min |
| Aug 28, 11:12 PM EDT | Severe Thunderstorm Warning | PBZ | Butler | 63 min |
| Aug 28, 11:17 PM EDT | Severe Thunderstorm Warning | PBZ | Allegheny | 43 min |
| Aug 28, 11:47 PM EDT | Severe Thunderstorm Warning | PBZ | Bedford | 58 min |
| Aug 29, 12:08 AM EDT | Severe Thunderstorm Warning | PBZ | Fayette, Somerset, Westmoreland | 67 min |
| Aug 29, 6:17 PM EDT | Severe Thunderstorm Warning | CTP | York | 43 min |
| Sep 2, 4:45 PM EDT | Severe Thunderstorm Warning | PBZ | Greene | 75 min |
| Sep 2, 4:45 PM EDT | Severe Thunderstorm Warning | PBZ | Somerset, Westmoreland | 75 min |
| Sep 2, 4:50 PM EDT | Severe Thunderstorm Warning | BGM | Lackawanna, Luzerne | 55 min |
| Sep 2, 6:12 PM EDT | Severe Thunderstorm Warning | BGM | Luzerne | 43 min |
| Sep 2, 6:47 PM EDT | Severe Thunderstorm Warning | CTP | Carbon, Schuylkill | 28 min |
| Sep 5, 8:24 AM EDT | Severe Thunderstorm Warning | PBZ | Beaver | 36 min |
| Sep 5, 8:33 AM EDT | Severe Thunderstorm Warning | PBZ | Clarion | 42 min |
| Sep 6, 3:19 PM EDT | Severe Thunderstorm Warning | CLE | Crawford, Erie | 56 min |
| Sep 6, 4:10 PM EDT | Severe Thunderstorm Warning | CLE | Mercer | 65 min |
| Sep 6, 4:18 PM EDT | Severe Thunderstorm Warning | CLE | Crawford | 57 min |
| Sep 6, 4:35 PM EDT | Severe Thunderstorm Warning | CLE | Lawrence | 55 min |
| Sep 6, 4:35 PM EDT | Severe Thunderstorm Warning | PBZ | Beaver, Butler, Clarion | 85 min |
| Sep 6, 4:50 PM EDT | Severe Thunderstorm Warning | PBZ | Armstrong | 100 min |
| Sep 6, 4:52 PM EDT | Severe Thunderstorm Warning | CLE | Venango | 68 min |
| Sep 6, 5:13 PM EDT | Severe Thunderstorm Warning | PBZ | Allegheny, Washington, Westmoreland | 77 min |
| Sep 6, 5:13 PM EDT | Severe Thunderstorm Warning | PBZ | Indiana, Jefferson | 77 min |
| Sep 6, 5:52 PM EDT | Severe Thunderstorm Warning | PBZ | Cambria, Clearfield, Indiana | 98 min |
| Sep 6, 5:52 PM EDT | Severe Thunderstorm Warning | PBZ | Fayette, Greene | 98 min |
| Sep 6, 5:52 PM EDT | Severe Thunderstorm Warning | PBZ | Westmoreland | 98 min |
| Sep 6, 6:56 PM EDT | Severe Thunderstorm Warning | PBZ | Bedford, Blair | 64 min |
| Sep 6, 7:46 PM EDT | Severe Thunderstorm Warning | CLE | Erie | 59 min |
| Sep 6, 8:44 PM EDT | Severe Thunderstorm Warning | CLE | Crawford, Erie | 61 min |
| Sep 6, 9:18 PM EDT | Severe Thunderstorm Warning | CLE | Lawrence | 87 min |
| Sep 6, 9:42 PM EDT | Severe Thunderstorm Warning | PBZ | Beaver, Washington | 78 min |
| Sep 6, 9:42 PM EDT | Severe Thunderstorm Warning | PBZ | Greene | 78 min |
| Sep 6, 9:42 PM EDT | Severe Thunderstorm Warning | PBZ | Armstrong, Clarion, Jefferson | 78 min |
| Sep 6, 9:42 PM EDT | Severe Thunderstorm Warning | PBZ | Allegheny, Butler | 78 min |
| Sep 6, 11:00 PM EDT | Severe Thunderstorm Warning | PBZ | Allegheny, Fayette, Washington, Westmoreland | 60 min |
| Sep 9, 7:06 PM EDT | Severe Thunderstorm Warning | PBZ | Westmoreland | 69 min |
| Sep 14, 6:11 PM EDT | Severe Thunderstorm Warning | CLE | Crawford, Erie | 94 min |
| Sep 14, 6:55 PM EDT | Severe Thunderstorm Warning | CLE | Mercer | 65 min |
| Sep 14, 7:14 PM EDT | Severe Thunderstorm Warning | CLE | Lawrence | 91 min |
| Sep 14, 7:18 PM EDT | Severe Thunderstorm Warning | PBZ | Beaver, Washington | 57 min |
| Sep 14, 7:18 PM EDT | Severe Thunderstorm Warning | PBZ | Butler | 57 min |
| Sep 14, 7:36 PM EDT | Severe Thunderstorm Warning | PBZ | Allegheny | 69 min |
| Sep 14, 7:58 PM EDT | Severe Thunderstorm Warning | PBZ | Washington, Westmoreland | 62 min |
| Sep 14, 7:58 PM EDT | Severe Thunderstorm Warning | PBZ | Armstrong, Butler, Clarion | 62 min |
| Sep 14, 8:50 PM EDT | Severe Thunderstorm Warning | PBZ | Armstrong, Indiana, Jefferson, Westmoreland | 55 min |
| Sep 14, 8:50 PM EDT | Severe Thunderstorm Warning | PBZ | Clarion | 55 min |
| Sep 14, 9:26 PM EDT | Severe Thunderstorm Warning | PBZ | Fayette | 64 min |
| Sep 14, 9:53 PM EDT | Severe Thunderstorm Warning | PBZ | Cambria, Somerset | 67 min |
| Sep 14, 9:53 PM EDT | Severe Thunderstorm Warning | PBZ | Clearfield | 67 min |
| Sep 14, 10:54 PM EDT | Severe Thunderstorm Warning | CTP | Centre | 51 min |
| Sep 14, 11:16 PM EDT | Severe Thunderstorm Warning | CTP | Mifflin | 44 min |
| Oct 18, 12:40 PM EDT | Severe Thunderstorm Warning | CTP | Centre | 65 min |
| Dec 23, 6:01 AM EST | Severe Thunderstorm Warning | PBZ | Fayette, Somerset, Westmoreland | 59 min |
| Dec 23, 6:01 AM EST | Severe Thunderstorm Warning | PBZ | Cambria, Indiana | 59 min |
| Dec 23, 6:55 AM EST | Severe Thunderstorm Warning | PBZ | Somerset | 35 min |
| Dec 23, 6:55 AM EST | Severe Thunderstorm Warning | PBZ | Bedford, Blair, Cambria | 65 min |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Washington County22
- Westmoreland County18
- Somerset County18
- Allegheny County16
- Butler County15
- Armstrong County15
- Fayette County15
- Cambria County15
- Beaver County14
- Indiana County12
- Clarion County11
- Crawford County10
- Erie County10
- Greene County10
- Centre County9
- Venango County8
- Clearfield County8
- Jefferson County8
- Bedford County7
- Lycoming County7
- Mercer County7
- Tioga County6
- York County6
- Northampton County6
- Bucks County6
- Lawrence County6
- Philadelphia County5
- Carbon County5
- Luzerne County5
- Clinton County4
- Cumberland County4
- Adams County4
- Delaware County4
- Montgomery County4
- Bradford County4
- Lehigh County4
- Blair County4
- Mifflin County4
- Lackawanna County4
- Union County4
25 more counties
- Lancaster County3
- Chester County3
- Forest County3
- Wayne County3
- Monroe County3
- Schuylkill County3
- Huntingdon County3
- Snyder County3
- Warren County3
- Sullivan County2
- McKean County2
- Potter County2
- Cameron County2
- Elk County2
- Franklin County2
- Wyoming County2
- Perry County2
- Berks County2
- Dauphin County1
- Lebanon County1
- Susquehanna County1
- Pike County1
- Northumberland County1
- Fulton County1
- Juniata County1
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordThe radar archive19891991
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. Rebuilt daily.