Alert archive / Pennsylvania / Severe Thunderstorm Warnings
Severe Thunderstorm Warnings in Pennsylvania, 1997
306 severe thunderstorm warnings in 1997. 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 1997. Tap one for its archive.
- Severe Thunderstorm Warnings
- 306
- Busiest month
- May96 severe thunderstorm warnings
- Busiest day
- August 16, 199749 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 |
|---|---|---|---|---|
| Feb 22, 3:12 AM EST | Severe Thunderstorm Warning | CLE | Erie | 48 min |
| Feb 22, 12:31 PM EST | Severe Thunderstorm Warning | PHI | Bucks, Delaware, Montgomery, Philadelphia | 64 min |
| Mar 29, 9:47 AM EST | Severe Thunderstorm Warning | CTP | Bedford, Huntingdon | 43 min |
| Mar 29, 12:35 PM EST | Severe Thunderstorm Warning | CTP | Adams, York | 55 min |
| Mar 29, 2:19 PM EST | Severe Thunderstorm Warning | CTP | Lancaster | 26 min |
| May 1, 3:31 PM EDT | Severe Thunderstorm Warning | CTP | Dauphin | 29 min |
| May 1, 3:48 PM EDT | Severe Thunderstorm Warning | CTP | Schuylkill | 57 min |
| May 1, 4:09 PM EDT | Severe Thunderstorm Warning | CTP | Lancaster | 66 min |
| May 1, 4:16 PM EDT | Severe Thunderstorm Warning | BGM | Luzerne | 44 min |
| May 1, 4:22 PM EDT | Severe Thunderstorm Warning | CTP | York | 68 min |
| May 1, 4:38 PM EDT | Severe Thunderstorm Warning | PHI | Berks, Lehigh | 52 min |
| May 1, 4:38 PM EDT | Severe Thunderstorm Warning | PHI | Carbon | 52 min |
| May 1, 5:32 PM EDT | Severe Thunderstorm Warning | PHI | Bucks, Montgomery | 28 min |
| May 1, 6:09 PM EDT | Severe Thunderstorm Warning | PHI | Delaware, Philadelphia | 46 min |
| May 1, 6:18 PM EDT | Severe Thunderstorm Warning | PHI | Montgomery | 32 min |
| May 1, 6:30 PM EDT | Severe Thunderstorm Warning | PHI | Bucks | 40 min |
| May 3, 1:23 PM EDT | Severe Thunderstorm Warning | PBZ | Mercer | 67 min |
| May 3, 1:26 PM EDT | Severe Thunderstorm Warning | CTP | Centre, Clinton | 64 min |
| May 3, 1:57 PM EDT | Severe Thunderstorm Warning | CTP | Lycoming | 63 min |
| May 3, 1:57 PM EDT | Severe Thunderstorm Warning | PBZ | Washington | 63 min |
| May 3, 3:15 PM EDT | Severe Thunderstorm Warning | PBZ | Beaver | 45 min |
| May 3, 3:24 PM EDT | Severe Thunderstorm Warning | PBZ | Washington | 51 min |
| May 3, 3:26 PM EDT | Severe Thunderstorm Warning | PBZ | Lawrence | 49 min |
| May 3, 3:29 PM EDT | Severe Thunderstorm Warning | PBZ | Mercer | 46 min |
| May 3, 3:33 PM EDT | Severe Thunderstorm Warning | CLE | Crawford | 57 min |
| May 3, 3:36 PM EDT | Severe Thunderstorm Warning | PBZ | Allegheny, Butler | 54 min |
| May 3, 3:45 PM EDT | Severe Thunderstorm Warning | PBZ | Fayette | 30 min |
| May 3, 3:46 PM EDT | Severe Thunderstorm Warning | CTP | Adams, Cumberland, York | 59 min |
| May 3, 3:50 PM EDT | Severe Thunderstorm Warning | CTP | Clearfield | 55 min |
| May 3, 3:58 PM EDT | Severe Thunderstorm Warning | CTP | Bedford, Blair, Cambria | 62 min |
| May 3, 4:00 PM EDT | Severe Thunderstorm Warning | CTP | Juniata, Northumberland, Perry, Snyder | 60 min |
| May 3, 4:00 PM EDT | Severe Thunderstorm Warning | CTP | Dauphin | 60 min |
| May 3, 4:07 PM EDT | Severe Thunderstorm Warning | PBZ | Armstrong, Westmoreland | 68 min |
| May 3, 4:19 PM EDT | Severe Thunderstorm Warning | CTP | Columbia | 56 min |
| May 3, 4:24 PM EDT | Severe Thunderstorm Warning | CTP | Centre, Clinton, Huntingdon | 66 min |
| May 3, 4:34 PM EDT | Severe Thunderstorm Warning | CTP | Potter, Tioga | 56 min |
| May 3, 4:37 PM EDT | Severe Thunderstorm Warning | PBZ | Venango | 53 min |
| May 3, 4:41 PM EDT | Severe Thunderstorm Warning | CTP | Lycoming | 64 min |
| May 3, 4:50 PM EDT | Severe Thunderstorm Warning | PHI | Berks | 50 min |
| May 3, 4:54 PM EDT | Severe Thunderstorm Warning | CTP | Schuylkill | 66 min |
| May 3, 5:15 PM EDT | Severe Thunderstorm Warning | PHI | Carbon, Monroe | 60 min |
| May 3, 6:22 PM EDT | Severe Thunderstorm Warning | CTP | York | 68 min |
| May 5, 7:42 AM EDT | Severe Thunderstorm Warning | CTP | Clearfield | 63 min |
| May 6, 12:20 AM EDT | Severe Thunderstorm Warning | CLE | Crawford | 40 min |
| May 6, 2:36 AM EDT | Severe Thunderstorm Warning | CLE | Erie | 69 min |
| May 6, 9:55 AM EDT | Severe Thunderstorm Warning | CTP | Columbia | 50 min |
| May 6, 9:59 AM EDT | Severe Thunderstorm Warning | CTP | Snyder | 31 min |
| May 6, 10:08 AM EDT | Severe Thunderstorm Warning | CTP | Montour, Northumberland | 52 min |
| May 6, 10:08 AM EDT | Severe Thunderstorm Warning | CTP | Sullivan | 52 min |
| May 6, 10:16 AM EDT | Severe Thunderstorm Warning | BGM | Luzerne, Wyoming | 59 min |
| May 6, 10:18 AM EDT | Severe Thunderstorm Warning | CTP | Dauphin, Schuylkill | 57 min |
| May 6, 10:28 AM EDT | Severe Thunderstorm Warning | CTP | Cumberland, Perry | 62 min |
| May 6, 11:07 AM EDT | Severe Thunderstorm Warning | PHI | Carbon, Monroe | 63 min |
| May 6, 11:11 AM EDT | Severe Thunderstorm Warning | BGM | Wayne | 64 min |
| May 6, 11:23 AM EDT | Severe Thunderstorm Warning | CTP | Lancaster | 67 min |
| May 6, 11:28 AM EDT | Severe Thunderstorm Warning | BGM | Pike | 62 min |
| May 6, 12:44 PM EDT | Severe Thunderstorm Warning | PHI | Bucks | 31 min |
| May 15, 12:12 AM EDT | Severe Thunderstorm Warning | PBZ | Fayette | 63 min |
| May 15, 12:51 AM EDT | Severe Thunderstorm Warning | CTP | Somerset | 69 min |
| May 18, 5:19 PM EDT | Severe Thunderstorm Warning | PBZ | Washington | 41 min |
| May 18, 8:33 PM EDT | Severe Thunderstorm Warning | PBZ | Allegheny, Washington | 27 min |
| May 18, 9:19 PM EDT | Severe Thunderstorm Warning | PBZ | Fayette, Greene | 41 min |
| May 18, 9:30 PM EDT | Severe Thunderstorm Warning | CTP | Somerset | 60 min |
| May 18, 11:26 PM EDT | Severe Thunderstorm Warning | PBZ | Mercer | 64 min |
| May 19, 12:03 AM EDT | Severe Thunderstorm Warning | CLE | Crawford | 57 min |
| May 19, 12:06 AM EDT | Severe Thunderstorm Warning | PBZ | Venango | 69 min |
| May 19, 12:36 AM EDT | Severe Thunderstorm Warning | PBZ | Mercer | 69 min |
| May 19, 4:28 PM EDT | Severe Thunderstorm Warning | CLE | Crawford | 47 min |
| May 19, 4:30 PM EDT | Severe Thunderstorm Warning | CLE | Erie | 45 min |
| May 19, 4:36 PM EDT | Severe Thunderstorm Warning | CTP | Warren | 69 min |
| May 19, 5:19 PM EDT | Severe Thunderstorm Warning | PBZ | Beaver | 26 min |
| May 19, 5:20 PM EDT | Severe Thunderstorm Warning | CTP | McKean | 55 min |
| May 19, 5:24 PM EDT | Severe Thunderstorm Warning | PBZ | Allegheny | 51 min |
| May 19, 5:56 PM EDT | Severe Thunderstorm Warning | PBZ | Westmoreland | 49 min |
| May 19, 6:19 PM EDT | Severe Thunderstorm Warning | PBZ | Armstrong, Indiana | 41 min |
| May 19, 6:21 PM EDT | Severe Thunderstorm Warning | PBZ | Washington | 54 min |
| May 19, 6:23 PM EDT | Severe Thunderstorm Warning | CTP | Clearfield, Elk | 67 min |
| May 19, 6:31 PM EDT | Severe Thunderstorm Warning | CTP | Cameron | 29 min |
| May 19, 6:34 PM EDT | Severe Thunderstorm Warning | CTP | Clinton | 56 min |
| May 19, 6:37 PM EDT | Severe Thunderstorm Warning | PBZ | Allegheny | 53 min |
| May 19, 6:40 PM EDT | Severe Thunderstorm Warning | CTP | Centre | 65 min |
| May 19, 6:46 PM EDT | Severe Thunderstorm Warning | PBZ | Westmoreland | 3 hr |
| May 19, 6:47 PM EDT | Severe Thunderstorm Warning | CTP | Cambria | 58 min |
| May 19, 6:57 PM EDT | Severe Thunderstorm Warning | PBZ | Indiana | 33 min |
| May 19, 7:04 PM EDT | Severe Thunderstorm Warning | CTP | Lycoming | 56 min |
| May 19, 7:07 PM EDT | Severe Thunderstorm Warning | PBZ | Fayette | 68 min |
| May 19, 7:29 PM EDT | Severe Thunderstorm Warning | CTP | Blair | 61 min |
| May 19, 7:41 PM EDT | Severe Thunderstorm Warning | CTP | Sullivan | 64 min |
| May 19, 7:41 PM EDT | Severe Thunderstorm Warning | CTP | Montour, Northumberland, Union | 64 min |
| May 19, 7:46 PM EDT | Severe Thunderstorm Warning | CTP | Huntingdon, Mifflin | 59 min |
| May 19, 7:50 PM EDT | Severe Thunderstorm Warning | CTP | Juniata, Snyder | 55 min |
| May 19, 7:56 PM EDT | Severe Thunderstorm Warning | CTP | Columbia | 64 min |
| May 19, 8:00 PM EDT | Severe Thunderstorm Warning | CTP | Northumberland | 45 min |
| May 19, 8:08 PM EDT | Severe Thunderstorm Warning | BGM | Luzerne | 52 min |
| May 19, 8:29 PM EDT | Severe Thunderstorm Warning | CTP | Dauphin, Schuylkill | 61 min |
| May 19, 8:29 PM EDT | Severe Thunderstorm Warning | CTP | Perry | 61 min |
| May 19, 8:32 PM EDT | Severe Thunderstorm Warning | PHI | Carbon, Monroe | 48 min |
| May 19, 8:34 PM EDT | Severe Thunderstorm Warning | BGM | Lackawanna, Wayne | 56 min |
| May 19, 8:44 PM EDT | Severe Thunderstorm Warning | CTP | Cumberland, Franklin | 61 min |
| May 19, 8:50 PM EDT | Severe Thunderstorm Warning | CTP | Lebanon | 55 min |
| May 19, 9:08 PM EDT | Severe Thunderstorm Warning | BGM | Pike | 67 min |
| Jun 12, 6:56 PM EDT | Severe Thunderstorm Warning | CTP | Sullivan | 29 min |
| Jun 12, 10:11 PM EDT | Severe Thunderstorm Warning | CTP | Juniata, Mifflin | 49 min |
| Jun 18, 2:07 PM EDT | Severe Thunderstorm Warning | CTP | Clearfield, Elk | 68 min |
| Jun 18, 2:40 PM EDT | Severe Thunderstorm Warning | CTP | Cameron | 65 min |
| Jun 18, 3:07 PM EDT | Severe Thunderstorm Warning | CTP | Centre, Clinton | 68 min |
| Jun 18, 3:27 PM EDT | Severe Thunderstorm Warning | CTP | Clearfield | 48 min |
| Jun 18, 3:58 PM EDT | Severe Thunderstorm Warning | CTP | Bedford | 62 min |
| Jun 18, 4:21 PM EDT | Severe Thunderstorm Warning | CTP | Centre | 69 min |
| Jun 18, 5:01 PM EDT | Severe Thunderstorm Warning | CTP | Bedford, Fulton | 59 min |
| Jun 18, 5:14 PM EDT | Severe Thunderstorm Warning | CTP | McKean, Potter | 61 min |
| Jun 18, 5:48 PM EDT | Severe Thunderstorm Warning | CTP | Blair, Huntingdon | 57 min |
| Jun 18, 7:24 PM EDT | Severe Thunderstorm Warning | CTP | Adams | 51 min |
| Jun 18, 8:47 PM EDT | Severe Thunderstorm Warning | CTP | Lancaster, York | 58 min |
| Jun 18, 9:20 PM EDT | Severe Thunderstorm Warning | PHI | Berks | 45 min |
| Jun 22, 2:09 PM EDT | Severe Thunderstorm Warning | BGM | Lackawanna, Luzerne | 66 min |
| Jun 24, 2:57 PM EDT | Severe Thunderstorm Warning | CTP | Clinton | 63 min |
| Jun 24, 3:57 PM EDT | Severe Thunderstorm Warning | CTP | Clinton | 63 min |
| Jun 24, 4:38 PM EDT | Severe Thunderstorm Warning | CTP | Centre | 32 min |
| Jun 24, 4:43 PM EDT | Severe Thunderstorm Warning | CTP | Union | 62 min |
| Jun 25, 5:57 PM EDT | Severe Thunderstorm Warning | CLE | Erie | 33 min |
| Jun 25, 6:38 PM EDT | Severe Thunderstorm Warning | CTP | McKean | 67 min |
| Jun 25, 7:10 PM EDT | Severe Thunderstorm Warning | CTP | Warren | 20 min |
| Jun 25, 7:45 PM EDT | Severe Thunderstorm Warning | CTP | Warren | 60 min |
| Jun 25, 7:56 PM EDT | Severe Thunderstorm Warning | CLE | Crawford | 64 min |
| Jun 25, 8:12 PM EDT | Severe Thunderstorm Warning | CTP | McKean | 63 min |
| Jun 25, 8:31 PM EDT | Severe Thunderstorm Warning | PBZ | Forest | 59 min |
| Jun 25, 8:56 PM EDT | Severe Thunderstorm Warning | PBZ | Mercer | 64 min |
| Jun 25, 9:02 PM EDT | Severe Thunderstorm Warning | CTP | Cameron, Elk | 58 min |
| Jun 25, 9:11 PM EDT | Severe Thunderstorm Warning | CTP | Potter, Tioga | 64 min |
| Jun 25, 9:20 PM EDT | Severe Thunderstorm Warning | PBZ | Venango | 55 min |
| Jun 26, 4:13 PM EDT | Severe Thunderstorm Warning | PHI | Monroe | 47 min |
| Jul 2, 9:43 PM EDT | Severe Thunderstorm Warning | CLE | Erie | 62 min |
| Jul 7, 1:14 PM EDT | Severe Thunderstorm Warning | CTP | McKean | 61 min |
| Jul 7, 1:35 PM EDT | Severe Thunderstorm Warning | CTP | Potter | 65 min |
| Jul 7, 2:12 PM EDT | Severe Thunderstorm Warning | CTP | Tioga | 48 min |
| Jul 7, 2:20 PM EDT | Severe Thunderstorm Warning | BGM | Bradford | 55 min |
| Jul 7, 3:10 PM EDT | Severe Thunderstorm Warning | BGM | Bradford | 65 min |
| Jul 7, 3:37 PM EDT | Severe Thunderstorm Warning | CTP | Tioga | 63 min |
| Jul 7, 4:12 PM EDT | Severe Thunderstorm Warning | CTP | Sullivan | 63 min |
| Jul 7, 5:09 PM EDT | Severe Thunderstorm Warning | CTP | Lycoming | 61 min |
| Jul 8, 2:30 PM EDT | Severe Thunderstorm Warning | CTP | Warren | 35 min |
| Jul 8, 3:34 PM EDT | Severe Thunderstorm Warning | CTP | McKean | 76 min |
| Jul 8, 7:52 PM EDT | Severe Thunderstorm Warning | BGM | Susquehanna | 68 min |
| Jul 9, 1:10 PM EDT | Severe Thunderstorm Warning | CTP | Bedford | 65 min |
| Jul 9, 1:42 PM EDT | Severe Thunderstorm Warning | CTP | Huntingdon | 63 min |
| Jul 9, 2:26 PM EDT | Severe Thunderstorm Warning | BGM | Pike | 64 min |
| Jul 9, 2:50 PM EDT | Severe Thunderstorm Warning | CTP | Fulton | 55 min |
| Jul 9, 3:53 PM EDT | Severe Thunderstorm Warning | PHI | Berks | 62 min |
| Jul 9, 4:26 PM EDT | Severe Thunderstorm Warning | CTP | Franklin | 64 min |
| Jul 9, 4:30 PM EDT | Severe Thunderstorm Warning | CTP | Adams | 60 min |
| Jul 9, 4:35 PM EDT | Severe Thunderstorm Warning | CTP | Lancaster | 55 min |
| Jul 9, 4:39 PM EDT | Severe Thunderstorm Warning | CTP | York | 66 min |
| Jul 9, 4:49 PM EDT | Severe Thunderstorm Warning | PHI | Lehigh | 66 min |
| Jul 9, 4:53 PM EDT | Severe Thunderstorm Warning | PHI | Berks | 32 min |
| Jul 9, 5:00 PM EDT | Severe Thunderstorm Warning | PHI | Bucks, Northampton | 65 min |
| Jul 9, 5:00 PM EDT | Severe Thunderstorm Warning | PHI | Montgomery | 65 min |
| Jul 9, 5:14 PM EDT | Severe Thunderstorm Warning | PHI | Chester | 66 min |
| Jul 9, 6:00 PM EDT | Severe Thunderstorm Warning | CTP | Lancaster | 65 min |
| Jul 9, 6:16 PM EDT | Severe Thunderstorm Warning | PHI | Chester | 64 min |
| Jul 15, 2:55 PM EDT | Severe Thunderstorm Warning | CTP | McKean, Warren | 60 min |
| Jul 15, 3:20 PM EDT | Severe Thunderstorm Warning | CTP | Elk, Warren | 60 min |
| Jul 15, 3:53 PM EDT | Severe Thunderstorm Warning | CTP | McKean | 62 min |
| Jul 15, 4:16 PM EDT | Severe Thunderstorm Warning | CTP | Elk | 64 min |
| Jul 15, 4:36 PM EDT | Severe Thunderstorm Warning | PBZ | Jefferson | 69 min |
| Jul 15, 5:13 PM EDT | Severe Thunderstorm Warning | CTP | Elk | 62 min |
| Jul 15, 5:25 PM EDT | Severe Thunderstorm Warning | CTP | Cameron | 65 min |
| Jul 15, 6:24 PM EDT | Severe Thunderstorm Warning | CTP | Clearfield | 66 min |
| Jul 15, 7:02 PM EDT | Severe Thunderstorm Warning | CTP | Centre | 63 min |
| Jul 15, 7:27 PM EDT | Severe Thunderstorm Warning | CTP | Centre, Clinton | 63 min |
| Jul 15, 7:29 PM EDT | Severe Thunderstorm Warning | CTP | Clearfield | 66 min |
| Jul 15, 7:46 PM EDT | Severe Thunderstorm Warning | CTP | Huntingdon | 64 min |
| Jul 18, 2:48 PM EDT | Severe Thunderstorm Warning | PBZ | Washington | 57 min |
| Jul 18, 2:58 PM EDT | Severe Thunderstorm Warning | PBZ | Allegheny | 62 min |
| Jul 18, 3:02 PM EDT | Severe Thunderstorm Warning | CTP | Cameron, McKean, Potter | 58 min |
| Jul 18, 3:15 PM EDT | Severe Thunderstorm Warning | PBZ | Westmoreland | 60 min |
| Jul 18, 3:30 PM EDT | Severe Thunderstorm Warning | CTP | Clinton | 65 min |
| Jul 18, 3:56 PM EDT | Severe Thunderstorm Warning | CTP | Bedford | 79 min |
| Jul 18, 4:01 PM EDT | Severe Thunderstorm Warning | CTP | McKean, Potter | 79 min |
| Jul 18, 4:24 PM EDT | Severe Thunderstorm Warning | CTP | Cameron | 61 min |
| Jul 18, 4:32 PM EDT | Severe Thunderstorm Warning | CTP | Clinton, Lycoming | 63 min |
| Jul 18, 4:35 PM EDT | Severe Thunderstorm Warning | CTP | Cambria | 65 min |
| Jul 18, 4:58 PM EDT | Severe Thunderstorm Warning | CTP | Columbia, Montour, Northumberland | 62 min |
| Jul 18, 4:58 PM EDT | Severe Thunderstorm Warning | CTP | Union | 62 min |
| Jul 18, 5:15 PM EDT | Severe Thunderstorm Warning | BGM | Luzerne | 60 min |
| Jul 18, 5:41 PM EDT | Severe Thunderstorm Warning | PHI | Carbon | 49 min |
| Jul 18, 5:50 PM EDT | Severe Thunderstorm Warning | CTP | Schuylkill | 60 min |
| Jul 18, 5:59 PM EDT | Severe Thunderstorm Warning | CTP | Centre, Clearfield | 61 min |
| Jul 18, 6:10 PM EDT | Severe Thunderstorm Warning | PHI | Lehigh, Monroe, Northampton | 45 min |
| Jul 18, 6:10 PM EDT | Severe Thunderstorm Warning | PHI | Berks | 45 min |
| Jul 18, 6:34 PM EDT | Severe Thunderstorm Warning | CTP | Mifflin | 46 min |
| Jul 18, 6:50 PM EDT | Severe Thunderstorm Warning | CTP | Juniata | 45 min |
| Jul 18, 7:15 PM EDT | Severe Thunderstorm Warning | CTP | Cambria | 50 min |
| Jul 18, 7:17 PM EDT | Severe Thunderstorm Warning | PBZ | Armstrong | 58 min |
| Jul 18, 7:19 PM EDT | Severe Thunderstorm Warning | PBZ | Allegheny | 56 min |
| Jul 18, 7:29 PM EDT | Severe Thunderstorm Warning | PBZ | Indiana | 46 min |
| Jul 18, 7:31 PM EDT | Severe Thunderstorm Warning | CTP | Cumberland, Dauphin | 64 min |
| Jul 18, 7:40 PM EDT | Severe Thunderstorm Warning | PBZ | Westmoreland | 50 min |
| Jul 18, 7:56 PM EDT | Severe Thunderstorm Warning | PBZ | Beaver, Washington | 49 min |
| Jul 18, 8:11 PM EDT | Severe Thunderstorm Warning | PBZ | Allegheny | 49 min |
| Jul 18, 8:30 PM EDT | Severe Thunderstorm Warning | CTP | Somerset | 65 min |
| Jul 18, 8:38 PM EDT | Severe Thunderstorm Warning | PBZ | Washington | 52 min |
| Jul 18, 8:44 PM EDT | Severe Thunderstorm Warning | PBZ | Fayette, Westmoreland | 46 min |
| Jul 21, 10:18 PM EDT | Severe Thunderstorm Warning | CTP | Franklin | 47 min |
| Jul 21, 10:46 PM EDT | Severe Thunderstorm Warning | CTP | Schuylkill | 64 min |
| Jul 21, 11:23 PM EDT | Severe Thunderstorm Warning | CTP | Dauphin, Lebanon | 47 min |
| Jul 22, 12:11 AM EDT | Severe Thunderstorm Warning | CTP | Lancaster, Lebanon | 64 min |
| Jul 28, 1:26 PM EDT | Severe Thunderstorm Warning | PBZ | Greene, Washington | 64 min |
| Jul 28, 1:58 PM EDT | Severe Thunderstorm Warning | PBZ | Fayette | 62 min |
| Jul 28, 2:19 PM EDT | Severe Thunderstorm Warning | CTP | Somerset | 61 min |
| Jul 28, 2:26 PM EDT | Severe Thunderstorm Warning | PBZ | Allegheny | 49 min |
| Jul 28, 3:08 PM EDT | Severe Thunderstorm Warning | CTP | Bedford | 62 min |
| Jul 28, 4:20 PM EDT | Severe Thunderstorm Warning | CTP | Franklin | 65 min |
| Jul 28, 4:59 PM EDT | Severe Thunderstorm Warning | CTP | Adams | 61 min |
| Jul 28, 5:06 PM EDT | Severe Thunderstorm Warning | CTP | York | 64 min |
| Aug 4, 5:47 PM EDT | Severe Thunderstorm Warning | CTP | Cumberland | 33 min |
| Aug 4, 5:54 PM EDT | Severe Thunderstorm Warning | CTP | Adams, York | 61 min |
| Aug 5, 6:31 PM EDT | Severe Thunderstorm Warning | CTP | Huntingdon | 64 min |
| Aug 5, 6:41 PM EDT | Severe Thunderstorm Warning | CTP | Franklin | 64 min |
| Aug 11, 6:00 PM EDT | Severe Thunderstorm Warning | CTP | Tioga | 50 min |
| Aug 12, 4:29 PM EDT | Severe Thunderstorm Warning | CTP | Bedford, Somerset | 61 min |
| Aug 12, 5:36 PM EDT | Severe Thunderstorm Warning | CTP | Bedford, Somerset | 69 min |
| Aug 12, 8:39 PM EDT | Severe Thunderstorm Warning | PBZ | Washington | 36 min |
| Aug 12, 8:55 PM EDT | Severe Thunderstorm Warning | PBZ | Allegheny | 50 min |
| Aug 12, 10:23 PM EDT | Severe Thunderstorm Warning | CLE | Crawford, Erie | 52 min |
| Aug 13, 5:02 PM EDT | Severe Thunderstorm Warning | CTP | Dauphin, Lancaster | 58 min |
| Aug 15, 5:38 PM EDT | Severe Thunderstorm Warning | PBZ | Washington | 52 min |
| Aug 15, 6:20 PM EDT | Severe Thunderstorm Warning | CTP | Cambria | 40 min |
| Aug 15, 6:30 PM EDT | Severe Thunderstorm Warning | PBZ | Westmoreland | 30 min |
| Aug 15, 7:08 PM EDT | Severe Thunderstorm Warning | CTP | Huntingdon | 47 min |
| Aug 15, 7:31 PM EDT | Severe Thunderstorm Warning | CTP | Mifflin | 49 min |
| Aug 15, 8:43 PM EDT | Severe Thunderstorm Warning | BGM | Lackawanna, Luzerne | 62 min |
| Aug 16, 3:23 AM EDT | Severe Thunderstorm Warning | PBZ | Beaver, Lawrence | 52 min |
| Aug 16, 3:41 AM EDT | Severe Thunderstorm Warning | PBZ | Butler | 49 min |
| Aug 16, 11:18 AM EDT | Severe Thunderstorm Warning | CLE | Crawford, Erie | 57 min |
| Aug 16, 11:32 AM EDT | Severe Thunderstorm Warning | CTP | Warren | 58 min |
| Aug 16, 11:39 AM EDT | Severe Thunderstorm Warning | PBZ | Mercer | 66 min |
| Aug 16, 12:08 PM EDT | Severe Thunderstorm Warning | PBZ | Venango | 67 min |
| Aug 16, 12:10 PM EDT | Severe Thunderstorm Warning | PBZ | Lawrence | 65 min |
| Aug 16, 12:26 PM EDT | Severe Thunderstorm Warning | CTP | McKean, Warren | 59 min |
| Aug 16, 12:35 PM EDT | Severe Thunderstorm Warning | PBZ | Clarion | 55 min |
| Aug 16, 12:37 PM EDT | Severe Thunderstorm Warning | PBZ | Forest | 68 min |
| Aug 16, 12:40 PM EDT | Severe Thunderstorm Warning | PBZ | Butler | 65 min |
| Aug 16, 12:43 PM EDT | Severe Thunderstorm Warning | CTP | Elk | 62 min |
| Aug 16, 12:46 PM EDT | Severe Thunderstorm Warning | PBZ | Armstrong | 29 min |
| Aug 16, 12:48 PM EDT | Severe Thunderstorm Warning | PBZ | Jefferson | 57 min |
| Aug 16, 1:12 PM EDT | Severe Thunderstorm Warning | CTP | Cameron, Potter | 58 min |
| Aug 16, 1:26 PM EDT | Severe Thunderstorm Warning | CTP | Clearfield | 59 min |
| Aug 16, 1:38 PM EDT | Severe Thunderstorm Warning | PBZ | Jefferson | 52 min |
| Aug 16, 1:43 PM EDT | Severe Thunderstorm Warning | CTP | Clinton | 62 min |
| Aug 16, 1:43 PM EDT | Severe Thunderstorm Warning | CTP | Tioga | 62 min |
| Aug 16, 2:01 PM EDT | Severe Thunderstorm Warning | CTP | Lycoming | 64 min |
| Aug 16, 2:10 PM EDT | Severe Thunderstorm Warning | CTP | Centre | 60 min |
| Aug 16, 2:13 PM EDT | Severe Thunderstorm Warning | BGM | Bradford | 62 min |
| Aug 16, 2:17 PM EDT | Severe Thunderstorm Warning | CTP | Clinton | 63 min |
| Aug 16, 2:24 PM EDT | Severe Thunderstorm Warning | CTP | Clearfield | 31 min |
| Aug 16, 2:41 PM EDT | Severe Thunderstorm Warning | CTP | Sullivan | 64 min |
| Aug 16, 2:49 PM EDT | Severe Thunderstorm Warning | BGM | Lackawanna, Luzerne, Wyoming | 71 min |
| Aug 16, 2:49 PM EDT | Severe Thunderstorm Warning | BGM | Susquehanna | 71 min |
| Aug 16, 3:04 PM EDT | Severe Thunderstorm Warning | CTP | Columbia, Lycoming, Montour, Northumberland | 61 min |
| Aug 16, 3:04 PM EDT | Severe Thunderstorm Warning | CTP | Clinton, Union | 61 min |
| Aug 16, 3:22 PM EDT | Severe Thunderstorm Warning | CTP | Northumberland, Snyder | 63 min |
| Aug 16, 3:22 PM EDT | Severe Thunderstorm Warning | CTP | Columbia | 63 min |
| Aug 16, 3:45 PM EDT | Severe Thunderstorm Warning | PHI | Carbon, Monroe | 40 min |
| Aug 16, 3:52 PM EDT | Severe Thunderstorm Warning | BGM | Pike, Wayne | 68 min |
| Aug 16, 3:58 PM EDT | Severe Thunderstorm Warning | CTP | Schuylkill | 62 min |
| Aug 16, 4:11 PM EDT | Severe Thunderstorm Warning | PHI | Lehigh, Northampton | 44 min |
| Aug 16, 4:11 PM EDT | Severe Thunderstorm Warning | PHI | Berks | 44 min |
| Aug 16, 5:02 PM EDT | Severe Thunderstorm Warning | PHI | Bucks | 63 min |
| Aug 16, 5:03 PM EDT | Severe Thunderstorm Warning | PBZ | Mercer | 57 min |
| Aug 16, 5:46 PM EDT | Severe Thunderstorm Warning | PBZ | Venango | 59 min |
| Aug 16, 6:32 PM EDT | Severe Thunderstorm Warning | PBZ | Butler, Venango | 58 min |
| Aug 16, 6:40 PM EDT | Severe Thunderstorm Warning | PBZ | Lawrence | 65 min |
| Aug 16, 7:03 PM EDT | Severe Thunderstorm Warning | PBZ | Mercer | 57 min |
| Aug 16, 7:03 PM EDT | Severe Thunderstorm Warning | PBZ | Armstrong | 57 min |
| Aug 16, 7:08 PM EDT | Severe Thunderstorm Warning | PBZ | Clarion, Jefferson | 67 min |
| Aug 16, 7:14 PM EDT | Severe Thunderstorm Warning | CTP | McKean | 61 min |
| Aug 16, 7:35 PM EDT | Severe Thunderstorm Warning | PBZ | Butler, Lawrence | 55 min |
| Aug 16, 7:36 PM EDT | Severe Thunderstorm Warning | CTP | Potter | 64 min |
| Aug 16, 7:42 PM EDT | Severe Thunderstorm Warning | PBZ | Beaver | 63 min |
| Aug 16, 8:01 PM EDT | Severe Thunderstorm Warning | CTP | Clearfield | 64 min |
| Aug 16, 8:03 PM EDT | Severe Thunderstorm Warning | CLE | Erie | 57 min |
| Aug 16, 8:14 PM EDT | Severe Thunderstorm Warning | PBZ | Indiana | 61 min |
| Aug 16, 8:24 PM EDT | Severe Thunderstorm Warning | PBZ | Allegheny, Armstrong | 66 min |
| Aug 16, 8:45 PM EDT | Severe Thunderstorm Warning | PBZ | Washington | 90 min |
| Aug 16, 8:48 PM EDT | Severe Thunderstorm Warning | PBZ | Beaver | 27 min |
| Aug 16, 8:50 PM EDT | Severe Thunderstorm Warning | CTP | Centre | 60 min |
| Aug 16, 8:57 PM EDT | Severe Thunderstorm Warning | CTP | Centre | 53 min |
| Aug 16, 9:04 PM EDT | Severe Thunderstorm Warning | CTP | Schuylkill | 61 min |
| Aug 16, 9:15 PM EDT | Severe Thunderstorm Warning | PBZ | Fayette, Westmoreland | 2 hr |
| Aug 16, 9:28 PM EDT | Severe Thunderstorm Warning | PBZ | Greene | 2 hr |
| Aug 16, 9:34 PM EDT | Severe Thunderstorm Warning | PBZ | Allegheny | 26 min |
| Aug 16, 9:43 PM EDT | Severe Thunderstorm Warning | CTP | Schuylkill | 22 min |
| Aug 16, 10:05 PM EDT | Severe Thunderstorm Warning | CTP | Mifflin | 50 min |
| Aug 16, 10:09 PM EDT | Severe Thunderstorm Warning | CTP | Lancaster | 61 min |
| Aug 16, 10:18 PM EDT | Severe Thunderstorm Warning | PHI | Delaware, Montgomery, Philadelphia | 42 min |
| Aug 16, 11:01 PM EDT | Severe Thunderstorm Warning | CTP | Columbia, Montour | 64 min |
| Aug 16, 11:25 PM EDT | Severe Thunderstorm Warning | PHI | Bucks | 35 min |
| Aug 17, 4:45 PM EDT | Severe Thunderstorm Warning | CTP | Bedford, Somerset | 60 min |
| Aug 17, 5:12 PM EDT | Severe Thunderstorm Warning | CTP | Fulton | 58 min |
| Aug 17, 5:29 PM EDT | Severe Thunderstorm Warning | PBZ | Westmoreland | 61 min |
| Aug 28, 4:45 PM EDT | Severe Thunderstorm Warning | BGM | Susquehanna | 60 min |
| Aug 28, 4:54 PM EDT | Severe Thunderstorm Warning | CTP | Columbia, Montour | 46 min |
| Aug 28, 5:03 PM EDT | Severe Thunderstorm Warning | CTP | York | 62 min |
| Aug 28, 5:42 PM EDT | Severe Thunderstorm Warning | BGM | Wayne | 63 min |
| Sep 11, 6:19 PM EDT | Severe Thunderstorm Warning | CTP | York | 56 min |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Centre County12
- Clinton County12
- Washington County12
- McKean County12
- Allegheny County11
- Clearfield County11
- Bedford County10
- York County10
- Lancaster County9
- Schuylkill County9
- Westmoreland County9
- Erie County8
- Huntingdon County8
- Mercer County8
- Columbia County8
- Potter County8
- Warren County8
- Bucks County7
- Dauphin County7
- Luzerne County7
- Berks County7
- Lycoming County7
- Crawford County7
- Fayette County7
- Northumberland County7
- Somerset County7
- Elk County7
- Cameron County7
- Adams County6
- Carbon County6
- Beaver County6
- Armstrong County6
- Tioga County6
- Venango County6
- Monroe County6
- Montour County6
- Montgomery County5
- Lawrence County5
- Butler County5
- Cumberland County5
27 more counties
- Cambria County5
- Sullivan County5
- Mifflin County5
- Franklin County5
- Lehigh County4
- Juniata County4
- Snyder County4
- Wayne County4
- Pike County4
- Indiana County4
- Union County4
- Lackawanna County4
- Jefferson County4
- Delaware County3
- Philadelphia County3
- Blair County3
- Perry County3
- Greene County3
- Lebanon County3
- Fulton County3
- Bradford County3
- Susquehanna County3
- Northampton County3
- Wyoming County2
- Forest County2
- Chester County2
- Clarion County2
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordThe radar archive19961998
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.