Alert archive / Pennsylvania / Severe Thunderstorm Warnings / 2026
Severe Thunderstorm Warnings in Pennsylvania, September 2026
159 severe thunderstorm warnings in September 2026. 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 September 2026. Tap one for its archive.
- Severe Thunderstorm Warnings
- 159
- Busiest day
- September 3, 202668 severe thunderstorm warnings
Over time
By day
Days in UTC, the clock the archive keeps.
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 |
|---|---|---|---|---|
| Sep 1, 4:26 PM EDT | Severe Thunderstorm Warning | CTP | Lycoming, Sullivan | 49 min |
| Sep 1, 4:51 PM EDT | Severe Thunderstorm Warning | CTP | Lycoming, Tioga | 39 min |
| Sep 1, 5:04 PM EDT | Severe Thunderstorm Warning | CTP | Potter, Tioga | 41 min |
| Sep 1, 5:10 PM EDT | Severe Thunderstorm Warning | CTP | Columbia, Lycoming, Montour, Northumberland | 50 min |
| Sep 1, 5:42 PM EDT | Severe Thunderstorm Warning | CTP | Lycoming, Potter, Tioga | 48 min |
| Sep 1, 5:42 PM EDT | Severe Thunderstorm Warning | CTP | Columbia, Lycoming, Montour, Northumberland | 48 min |
| Sep 1, 5:45 PM EDT | Severe Thunderstorm Warning | PHI | Monroe, Northampton | 45 min |
| Sep 1, 5:49 PM EDT | Severe Thunderstorm Warning | BGM | Luzerne | 26 min |
| Sep 1, 5:50 PM EDT | Severe Thunderstorm Warning | PHI | Carbon, Lehigh, Northampton | 40 min |
| Sep 1, 5:53 PM EDT | Severe Thunderstorm Warning | BGM | Luzerne, Wyoming | 67 min |
| Sep 1, 6:01 PM EDT | Severe Thunderstorm Warning | CLE | Crawford | 59 min |
| Sep 1, 6:08 PM EDT | Severe Thunderstorm Warning | CTP | Columbia, Northumberland, Schuylkill | 52 min |
| Sep 1, 6:09 PM EDT | Severe Thunderstorm Warning | PHI | Berks | 51 min |
| Sep 1, 6:14 PM EDT | Severe Thunderstorm Warning | BGM | Bradford | 61 min |
| Sep 1, 6:15 PM EDT | Severe Thunderstorm Warning | PBZ | Clarion, Forest, Venango | 45 min |
| Sep 1, 6:21 PM EDT | Severe Thunderstorm Warning | PHI | Berks | 39 min |
| Sep 1, 6:29 PM EDT | Severe Thunderstorm Warning | PHI | Carbon, Lehigh, Northampton | 46 min |
| Sep 1, 6:33 PM EDT | Severe Thunderstorm Warning | CTP | Lebanon, Schuylkill | 57 min |
| Sep 1, 6:40 PM EDT | Severe Thunderstorm Warning | BGM | Lackawanna, Luzerne | 38 min |
| Sep 1, 6:40 PM EDT | Severe Thunderstorm Warning | PBZ | Clarion, Forest, Jefferson, Venango | 73 min |
| Sep 1, 6:42 PM EDT | Severe Thunderstorm Warning | CTP | Warren | 48 min |
| Sep 1, 6:56 PM EDT | Severe Thunderstorm Warning | PHI | Berks, Chester | 49 min |
| Sep 1, 6:58 PM EDT | Severe Thunderstorm Warning | PHI | Berks | 34 min |
| Sep 1, 7:07 PM EDT | Severe Thunderstorm Warning | CTP | Sullivan | 38 min |
| Sep 1, 7:13 PM EDT | Severe Thunderstorm Warning | PHI | Berks, Chester, Lehigh, Montgomery | 47 min |
| Sep 1, 7:14 PM EDT | Severe Thunderstorm Warning | BGM | Bradford, Susquehanna, Wyoming | 61 min |
| Sep 1, 7:27 PM EDT | Severe Thunderstorm Warning | CTP | Elk, McKean, Warren | 48 min |
| Sep 1, 7:31 PM EDT | Severe Thunderstorm Warning | CTP | Lancaster | 29 min |
| Sep 1, 7:43 PM EDT | Severe Thunderstorm Warning | PHI | Berks, Chester, Delaware | 47 min |
| Sep 1, 7:46 PM EDT | Severe Thunderstorm Warning | CTP | Columbia, Lycoming, Sullivan | 44 min |
| Sep 1, 7:59 PM EDT | Severe Thunderstorm Warning | CTP | Lancaster | 16 min |
| Sep 1, 8:17 PM EDT | Severe Thunderstorm Warning | PHI | Chester, Delaware | 58 min |
| Sep 2, 6:33 AM EDT | Severe Thunderstorm Warning | CLE | Erie | 57 min |
| Sep 2, 7:03 AM EDT | Severe Thunderstorm Warning | CLE | Crawford, Erie | 57 min |
| Sep 2, 7:06 AM EDT | Severe Thunderstorm Warning | CLE | Erie | 54 min |
| Sep 2, 7:06 AM EDT | Severe Thunderstorm Warning | CTP | Warren | 69 min |
| Sep 2, 7:29 AM EDT | Severe Thunderstorm Warning | CLE | Crawford | 61 min |
| Sep 2, 7:49 AM EDT | Severe Thunderstorm Warning | PBZ | Clarion, Forest, Venango | 56 min |
| Sep 2, 7:52 AM EDT | Severe Thunderstorm Warning | CLE | Crawford | 53 min |
| Sep 2, 8:10 AM EDT | Severe Thunderstorm Warning | CTP | Cameron, Elk, McKean, Warren | 80 min |
| Sep 2, 8:15 AM EDT | Severe Thunderstorm Warning | PBZ | Mercer, Venango | 60 min |
| Sep 2, 8:36 AM EDT | Severe Thunderstorm Warning | PBZ | Jefferson | 54 min |
| Sep 2, 8:51 AM EDT | Severe Thunderstorm Warning | CTP | Cameron, Clearfield, Elk | 39 min |
| Sep 2, 9:03 AM EDT | Severe Thunderstorm Warning | CTP | Cameron, Elk | 42 min |
| Sep 2, 9:12 AM EDT | Severe Thunderstorm Warning | PBZ | Butler, Clarion, Mercer, Venango | 48 min |
| Sep 2, 9:25 AM EDT | Severe Thunderstorm Warning | CTP | Cameron, Centre, Clearfield, Clinton, Elk | 50 min |
| Sep 2, 9:27 AM EDT | Severe Thunderstorm Warning | PBZ | Indiana, Jefferson | 48 min |
| Sep 2, 9:41 AM EDT | Severe Thunderstorm Warning | CTP | Blair, Cambria, Centre, Clearfield | 49 min |
| Sep 2, 10:06 AM EDT | Severe Thunderstorm Warning | CTP | Centre, Clinton, Mifflin | 39 min |
| Sep 2, 10:20 AM EDT | Severe Thunderstorm Warning | CTP | Blair, Huntingdon, Juniata, Mifflin | 40 min |
| Sep 2, 10:33 AM EDT | Severe Thunderstorm Warning | CTP | Blair, Cambria, Huntingdon | 42 min |
| Sep 2, 10:48 AM EDT | Severe Thunderstorm Warning | CTP | Cumberland, Juniata, Mifflin, Perry | 42 min |
| Sep 2, 11:02 AM EDT | Severe Thunderstorm Warning | CTP | Bedford, Blair, Cambria, Cumberland, Franklin, Fulton and 5 more | 43 min |
| Sep 2, 11:09 AM EDT | Severe Thunderstorm Warning | CTP | Dauphin, Perry | 51 min |
| Sep 2, 11:24 AM EDT | Severe Thunderstorm Warning | CTP | Adams, Cumberland, Dauphin, Lancaster, Perry, York | 51 min |
| Sep 2, 11:39 AM EDT | Severe Thunderstorm Warning | CTP | Adams, Bedford, Cambria, Cumberland, Franklin, Fulton and 2 more | 51 min |
| Sep 2, 11:49 AM EDT | Severe Thunderstorm Warning | CTP | Dauphin, Lancaster, Lebanon, Schuylkill, York | 56 min |
| Sep 2, 12:12 PM EDT | Severe Thunderstorm Warning | CTP | Lancaster, Lebanon, York | 33 min |
| Sep 2, 12:40 PM EDT | Severe Thunderstorm Warning | PHI | Chester | 65 min |
| Sep 2, 12:43 PM EDT | Severe Thunderstorm Warning | CTP | Lancaster, York | 32 min |
| Sep 2, 4:17 PM EDT | Severe Thunderstorm Warning | CLE | Crawford | 43 min |
| Sep 2, 4:54 PM EDT | Severe Thunderstorm Warning | CLE | Crawford | 34 min |
| Sep 2, 5:06 PM EDT | Severe Thunderstorm Warning | PBZ | Mercer, Venango | 39 min |
| Sep 2, 5:42 PM EDT | Severe Thunderstorm Warning | CTP | Bedford, Fulton | 48 min |
| Sep 2, 5:53 PM EDT | Severe Thunderstorm Warning | CLE | Crawford | 37 min |
| Sep 2, 5:53 PM EDT | Severe Thunderstorm Warning | PBZ | Clarion, Jefferson | 26 min |
| Sep 2, 6:11 PM EDT | Severe Thunderstorm Warning | PBZ | Forest, Venango | 26 min |
| Sep 2, 6:34 PM EDT | Severe Thunderstorm Warning | PBZ | Clarion, Forest | 26 min |
| Sep 2, 6:37 PM EDT | Severe Thunderstorm Warning | CTP | Bedford, Fulton | 38 min |
| Sep 2, 7:14 PM EDT | Severe Thunderstorm Warning | CTP | Franklin, Fulton | 46 min |
| Sep 2, 7:32 PM EDT | Severe Thunderstorm Warning | CTP | Cameron, Elk, McKean, Potter | 43 min |
| Sep 2, 7:49 PM EDT | Severe Thunderstorm Warning | CTP | Centre, Clinton | 41 min |
| Sep 2, 8:22 PM EDT | Severe Thunderstorm Warning | CTP | Clinton, Lycoming, Potter, Tioga | 38 min |
| Sep 2, 8:39 PM EDT | Severe Thunderstorm Warning | CTP | Clinton, Lycoming | 51 min |
| Sep 2, 8:43 PM EDT | Severe Thunderstorm Warning | PBZ | Venango | 47 min |
| Sep 2, 8:50 PM EDT | Severe Thunderstorm Warning | CTP | McKean, Potter, Tioga | 55 min |
| Sep 2, 8:53 PM EDT | Severe Thunderstorm Warning | BGM | Bradford | 67 min |
| Sep 2, 8:58 PM EDT | Severe Thunderstorm Warning | CTP | Clinton, Lycoming, Potter | 47 min |
| Sep 2, 9:03 PM EDT | Severe Thunderstorm Warning | CTP | Clinton, Lycoming | 57 min |
| Sep 2, 9:09 PM EDT | Severe Thunderstorm Warning | PBZ | Allegheny, Beaver, Butler | 51 min |
| Sep 2, 9:29 PM EDT | Severe Thunderstorm Warning | CTP | Tioga | 16 min |
| Sep 2, 9:39 PM EDT | Severe Thunderstorm Warning | PBZ | Armstrong, Butler | 22 min |
| Sep 2, 9:42 PM EDT | Severe Thunderstorm Warning | CLE | Erie | 78 min |
| Sep 2, 9:50 PM EDT | Severe Thunderstorm Warning | CTP | Centre, Clinton, Lycoming, Union | 40 min |
| Sep 2, 9:50 PM EDT | Severe Thunderstorm Warning | CTP | Lycoming, Sullivan, Tioga | 40 min |
| Sep 2, 9:59 PM EDT | Severe Thunderstorm Warning | BGM | Bradford, Susquehanna, Wayne, Wyoming | 46 min |
| Sep 2, 10:26 PM EDT | Severe Thunderstorm Warning | BGM | Lackawanna, Luzerne, Pike, Susquehanna, Wayne, Wyoming | 64 min |
| Sep 2, 10:29 PM EDT | Severe Thunderstorm Warning | CLE | Crawford, Erie | 30 min |
| Sep 2, 10:35 PM EDT | Severe Thunderstorm Warning | CTP | Warren | 40 min |
| Sep 2, 10:51 PM EDT | Severe Thunderstorm Warning | CTP | Dauphin, Northumberland, Snyder, Union | 39 min |
| Sep 2, 11:09 PM EDT | Severe Thunderstorm Warning | CTP | Elk, McKean, Warren | 66 min |
| Sep 2, 11:13 PM EDT | Severe Thunderstorm Warning | CTP | Dauphin, Juniata, Mifflin, Northumberland, Perry, Snyder | 47 min |
| Sep 2, 11:19 PM EDT | Severe Thunderstorm Warning | PBZ | Forest | 26 min |
| Sep 2, 11:26 PM EDT | Severe Thunderstorm Warning | CTP | Dauphin, Lebanon, Northumberland, Schuylkill, Snyder, Union | 49 min |
| Sep 2, 11:43 PM EDT | Severe Thunderstorm Warning | CTP | Cameron, Clearfield, Clinton, Elk, Lycoming, McKean and 2 more | 41 min |
| Sep 2, 11:51 PM EDT | Severe Thunderstorm Warning | CLE | Erie | 54 min |
| Sep 3, 12:23 AM EDT | Severe Thunderstorm Warning | CTP | Cameron, Centre, Clearfield, Clinton, Elk, Lycoming and 3 more | 61 min |
| Sep 3, 1:32 AM EDT | Severe Thunderstorm Warning | CTP | Centre, Huntingdon | 43 min |
| Sep 3, 1:34 AM EDT | Severe Thunderstorm Warning | CLE | Crawford | 41 min |
| Sep 3, 2:01 AM EDT | Severe Thunderstorm Warning | CLE | Crawford, Erie | 44 min |
| Sep 3, 2:16 AM EDT | Severe Thunderstorm Warning | PBZ | Mercer, Venango | 45 min |
| Sep 3, 5:31 AM EDT | Severe Thunderstorm Warning | PBZ | Butler, Lawrence, Mercer, Venango | 59 min |
| Sep 3, 5:51 AM EDT | Severe Thunderstorm Warning | CLE | Crawford, Erie | 39 min |
| Sep 3, 6:17 AM EDT | Severe Thunderstorm Warning | PBZ | Clarion, Forest, Venango | 58 min |
| Sep 3, 6:29 AM EDT | Severe Thunderstorm Warning | PBZ | Armstrong, Butler, Clarion, Forest, Lawrence, Mercer and 1 more | 46 min |
| Sep 3, 7:20 AM EDT | Severe Thunderstorm Warning | PBZ | Allegheny, Armstrong, Butler, Indiana, Westmoreland | 40 min |
| Sep 3, 8:12 AM EDT | Severe Thunderstorm Warning | PBZ | Indiana, Westmoreland | 48 min |
| Sep 3, 8:55 AM EDT | Severe Thunderstorm Warning | CTP | Bedford, Somerset | 50 min |
| Sep 3, 9:34 AM EDT | Severe Thunderstorm Warning | CTP | Bedford, Franklin, Fulton, Somerset | 41 min |
| Sep 3, 2:54 PM EDT | Severe Thunderstorm Warning | CLE | Crawford | 51 min |
| Sep 3, 3:34 PM EDT | Severe Thunderstorm Warning | PBZ | Mercer | 56 min |
| Sep 3, 3:40 PM EDT | Severe Thunderstorm Warning | CLE | Crawford | 50 min |
| Sep 3, 4:20 PM EDT | Severe Thunderstorm Warning | CLE | Crawford | 20 min |
| Sep 3, 4:23 PM EDT | Severe Thunderstorm Warning | PBZ | Butler, Clarion, Forest, Lawrence, Mercer, Venango | 67 min |
| Sep 3, 4:26 PM EDT | Severe Thunderstorm Warning | PBZ | Beaver, Lawrence | 49 min |
| Sep 3, 4:33 PM EDT | Severe Thunderstorm Warning | PBZ | Beaver, Butler, Lawrence | 42 min |
| Sep 3, 4:47 PM EDT | Severe Thunderstorm Warning | PBZ | Beaver | 43 min |
| Sep 3, 4:52 PM EDT | Severe Thunderstorm Warning | CLE | Crawford, Erie | 38 min |
| Sep 3, 4:55 PM EDT | Severe Thunderstorm Warning | PBZ | Butler, Lawrence, Mercer | 35 min |
| Sep 3, 5:07 PM EDT | Severe Thunderstorm Warning | PBZ | Allegheny, Beaver, Butler, Lawrence, Washington | 53 min |
| Sep 3, 5:12 PM EDT | Severe Thunderstorm Warning | PBZ | Armstrong, Butler, Clarion, Jefferson, Lawrence, Venango | 48 min |
| Sep 3, 5:19 PM EDT | Severe Thunderstorm Warning | PBZ | Beaver | 41 min |
| Sep 3, 5:25 PM EDT | Severe Thunderstorm Warning | PBZ | Washington | 50 min |
| Sep 3, 5:29 PM EDT | Severe Thunderstorm Warning | PBZ | Washington | 46 min |
| Sep 3, 5:47 PM EDT | Severe Thunderstorm Warning | PBZ | Allegheny, Armstrong, Beaver, Butler, Indiana, Washington and 1 more | 58 min |
| Sep 3, 5:57 PM EDT | Severe Thunderstorm Warning | PBZ | Allegheny, Beaver, Washington | 48 min |
| Sep 3, 6:09 PM EDT | Severe Thunderstorm Warning | PBZ | Allegheny, Washington | 21 min |
| Sep 3, 6:13 PM EDT | Severe Thunderstorm Warning | PBZ | Washington | 32 min |
| Sep 3, 6:21 PM EDT | Severe Thunderstorm Warning | PBZ | Allegheny, Westmoreland | 24 min |
| Sep 3, 6:34 PM EDT | Severe Thunderstorm Warning | PBZ | Allegheny, Armstrong, Fayette, Indiana, Westmoreland | 41 min |
| Sep 3, 6:40 PM EDT | Severe Thunderstorm Warning | PBZ | Allegheny, Fayette, Greene, Washington, Westmoreland | 24 min |
| Sep 3, 6:46 PM EDT | Severe Thunderstorm Warning | PBZ | Fayette, Westmoreland | 44 min |
| Sep 3, 6:51 PM EDT | Severe Thunderstorm Warning | PBZ | Lawrence, Mercer, Venango | 54 min |
| Sep 3, 6:53 PM EDT | Severe Thunderstorm Warning | CLE | Crawford | 30 min |
| Sep 3, 7:01 PM EDT | Severe Thunderstorm Warning | CTP | Cambria, Somerset | 44 min |
| Sep 3, 7:08 PM EDT | Severe Thunderstorm Warning | PBZ | Fayette, Indiana, Westmoreland | 37 min |
| Sep 3, 7:20 PM EDT | Severe Thunderstorm Warning | CTP | Cambria, Somerset | 25 min |
| Sep 3, 7:42 PM EDT | Severe Thunderstorm Warning | CTP | Bedford, Blair, Cambria, Fulton, Huntingdon, Somerset | 48 min |
| Sep 3, 7:47 PM EDT | Severe Thunderstorm Warning | BGM | Lackawanna, Susquehanna, Wayne, Wyoming | 43 min |
| Sep 3, 7:54 PM EDT | Severe Thunderstorm Warning | PBZ | Washington | 51 min |
| Sep 3, 8:39 PM EDT | Severe Thunderstorm Warning | BGM | Lackawanna, Luzerne | 51 min |
| Sep 3, 8:44 PM EDT | Severe Thunderstorm Warning | PBZ | Allegheny, Fayette, Greene, Washington, Westmoreland | 46 min |
| Sep 3, 9:06 PM EDT | Severe Thunderstorm Warning | PBZ | Fayette, Greene, Washington | 24 min |
| Sep 3, 9:17 PM EDT | Severe Thunderstorm Warning | PHI | Carbon, Monroe | 31 min |
| Sep 3, 9:24 PM EDT | Severe Thunderstorm Warning | PBZ | Fayette, Greene | 66 min |
| Sep 4, 12:34 AM EDT | Severe Thunderstorm Warning | PHI | Bucks, Lehigh, Northampton | 41 min |
| Sep 9, 4:54 PM EDT | Severe Thunderstorm Warning | CLE | Erie | 29 min |
| Sep 9, 7:21 PM EDT | Severe Thunderstorm Warning | PBZ | Allegheny, Beaver, Washington | 39 min |
| Sep 9, 7:33 PM EDT | Severe Thunderstorm Warning | CTP | Tioga | 42 min |
| Sep 9, 8:10 PM EDT | Severe Thunderstorm Warning | CTP | Tioga | 35 min |
| Sep 12, 3:01 PM EDT | Severe Thunderstorm Warning | PBZ | Allegheny, Washington, Westmoreland | 59 min |
| Sep 12, 4:20 PM EDT | Severe Thunderstorm Warning | PBZ | Armstrong, Indiana, Jefferson | 55 min |
| Sep 12, 4:48 PM EDT | Severe Thunderstorm Warning | PBZ | Armstrong, Indiana, Westmoreland | 72 min |
| Sep 13, 4:13 PM EDT | Severe Thunderstorm Warning | CLE | Crawford | 47 min |
| Sep 13, 4:42 PM EDT | Severe Thunderstorm Warning | CLE | Crawford | 33 min |
| Sep 13, 5:17 PM EDT | Severe Thunderstorm Warning | PBZ | Mercer, Venango | 30 min |
| Sep 13, 5:30 PM EDT | Severe Thunderstorm Warning | PBZ | Butler, Lawrence, Mercer | 34 min |
| Sep 13, 6:18 PM EDT | Severe Thunderstorm Warning | PBZ | Allegheny, Beaver, Butler | 42 min |
| Sep 13, 7:14 PM EDT | Severe Thunderstorm Warning | CTP | Clearfield | 46 min |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Crawford County18
- Venango County16
- Lycoming County14
- Butler County14
- Allegheny County13
- Washington County13
- Mercer County12
- Tioga County11
- Westmoreland County11
- Clarion County10
- Erie County10
- Clinton County10
- Beaver County10
- Lawrence County10
- Forest County9
- Elk County9
- Potter County8
- Indiana County8
- Armstrong County8
- Cameron County7
- Centre County7
- Cambria County7
- Bedford County7
- Fulton County7
- Somerset County7
- Fayette County7
- Northumberland County6
- Berks County6
- Jefferson County6
- Warren County6
- McKean County6
- Lancaster County6
- Clearfield County6
- Huntingdon County6
- Dauphin County6
- Sullivan County5
- Luzerne County5
- Wyoming County5
- Chester County5
- Blair County5
26 more counties
- Mifflin County5
- Perry County5
- Columbia County4
- Northampton County4
- Lehigh County4
- Schuylkill County4
- Bradford County4
- Lebanon County4
- Lackawanna County4
- Susquehanna County4
- Juniata County4
- Cumberland County4
- Franklin County4
- York County4
- Greene County4
- Carbon County3
- Union County3
- Wayne County3
- Snyder County3
- Montour County2
- Monroe County2
- Delaware County2
- Adams County2
- Montgomery County1
- Pike County1
- Bucks County1
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.