Alert archive / Pennsylvania / Severe Thunderstorm Warnings / 2020
Severe Thunderstorm Warnings in Pennsylvania, August 2020
130 severe thunderstorm warnings in August 2020. 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 August 2020. Tap one for its archive.
- Severe Thunderstorm Warnings
- 130
- Busiest day
- August 27, 202031 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 |
|---|---|---|---|---|
| Aug 1, 6:37 PM EDT | Severe Thunderstorm Warning | PBZ | Beaver, Lawrence | 38 min |
| Aug 1, 10:59 PM EDT | Severe Thunderstorm Warning | CTP | Franklin | 31 min |
| Aug 2, 6:30 AM EDT | Severe Thunderstorm Warning | PHI | Berks, Lehigh | 45 min |
| Aug 3, 6:59 PM EDT | Severe Thunderstorm Warning | PHI | Philadelphia | 31 min |
| Aug 3, 7:20 PM EDT | Severe Thunderstorm Warning | PHI | Bucks | 40 min |
| Aug 3, 7:56 PM EDT | Severe Thunderstorm Warning | PHI | Bucks | 52 min |
| Aug 4, 3:26 PM EDT | Severe Thunderstorm Warning | PBZ | Allegheny, Westmoreland | 34 min |
| Aug 7, 7:26 AM EDT | Severe Thunderstorm Warning | CTP | Clinton | 64 min |
| Aug 7, 8:08 AM EDT | Severe Thunderstorm Warning | CTP | Lycoming, Union | 67 min |
| Aug 7, 10:10 AM EDT | Severe Thunderstorm Warning | CTP | Columbia, Schuylkill | 65 min |
| Aug 7, 10:16 AM EDT | Severe Thunderstorm Warning | BGM | Luzerne | 59 min |
| Aug 7, 10:34 AM EDT | Severe Thunderstorm Warning | PHI | Carbon, Lehigh | 56 min |
| Aug 7, 11:37 AM EDT | Severe Thunderstorm Warning | CTP | Mifflin | 53 min |
| Aug 7, 5:00 PM EDT | Severe Thunderstorm Warning | PHI | Chester | 60 min |
| Aug 7, 5:38 PM EDT | Severe Thunderstorm Warning | PHI | Chester, Delaware, Montgomery, Philadelphia | 52 min |
| Aug 7, 5:57 PM EDT | Severe Thunderstorm Warning | PHI | Delaware, Philadelphia | 48 min |
| Aug 7, 6:39 PM EDT | Severe Thunderstorm Warning | PHI | Bucks | 27 min |
| Aug 12, 1:12 PM EDT | Severe Thunderstorm Warning | PHI | Chester, Delaware, Montgomery, Philadelphia | 48 min |
| Aug 12, 1:54 PM EDT | Severe Thunderstorm Warning | PHI | Chester, Delaware, Montgomery, Philadelphia | 51 min |
| Aug 12, 2:04 PM EDT | Severe Thunderstorm Warning | PHI | Bucks, Montgomery, Philadelphia | 21 min |
| Aug 12, 2:44 PM EDT | Severe Thunderstorm Warning | PHI | Delaware, Philadelphia | 46 min |
| Aug 12, 3:20 PM EDT | Severe Thunderstorm Warning | PHI | Chester, Delaware | 29 min |
| Aug 17, 5:27 PM EDT | Severe Thunderstorm Warning | CTP | Lancaster | 32 min |
| Aug 17, 5:38 PM EDT | Severe Thunderstorm Warning | PHI | Chester | 37 min |
| Aug 17, 6:16 PM EDT | Severe Thunderstorm Warning | PHI | Chester, Delaware | 16 min |
| Aug 17, 6:50 PM EDT | Severe Thunderstorm Warning | CTP | Warren | 28 min |
| Aug 17, 10:39 PM EDT | Severe Thunderstorm Warning | BGM | Lackawanna, Wyoming | 29 min |
| Aug 17, 11:37 PM EDT | Severe Thunderstorm Warning | BGM | Wayne | 23 min |
| Aug 17, 11:39 PM EDT | Severe Thunderstorm Warning | BGM | Luzerne | 36 min |
| Aug 17, 11:57 PM EDT | Severe Thunderstorm Warning | BGM | Wayne | 33 min |
| Aug 17, 11:59 PM EDT | Severe Thunderstorm Warning | PHI | Carbon, Monroe | 46 min |
| Aug 18, 12:39 AM EDT | Severe Thunderstorm Warning | PHI | Monroe, Northampton | 66 min |
| Aug 18, 1:09 AM EDT | Severe Thunderstorm Warning | BGM | Pike | 18 min |
| Aug 18, 1:38 AM EDT | Severe Thunderstorm Warning | PHI | Bucks, Northampton | 37 min |
| Aug 22, 8:10 PM EDT | Severe Thunderstorm Warning | PBZ | Allegheny | 35 min |
| Aug 23, 8:42 PM EDT | Severe Thunderstorm Warning | PHI | Chester, Delaware | 48 min |
| Aug 24, 12:19 PM EDT | Severe Thunderstorm Warning | PBZ | Armstrong, Clarion | 26 min |
| Aug 24, 12:41 PM EDT | Severe Thunderstorm Warning | PBZ | Butler | 19 min |
| Aug 24, 1:15 PM EDT | Severe Thunderstorm Warning | PHI | Carbon, Lehigh, Monroe, Northampton | 21 min |
| Aug 24, 1:53 PM EDT | Severe Thunderstorm Warning | CTP | Lycoming, Tioga | 36 min |
| Aug 24, 3:47 PM EDT | Severe Thunderstorm Warning | BGM | Luzerne | 43 min |
| Aug 24, 4:38 PM EDT | Severe Thunderstorm Warning | PHI | Carbon, Monroe, Northampton | 37 min |
| Aug 24, 6:14 PM EDT | Severe Thunderstorm Warning | PHI | Bucks, Northampton | 19 min |
| Aug 25, 6:41 AM EDT | Severe Thunderstorm Warning | PBZ | Allegheny, Armstrong, Butler, Westmoreland | 19 min |
| Aug 25, 7:55 AM EDT | Severe Thunderstorm Warning | PBZ | Armstrong, Indiana, Westmoreland | 50 min |
| Aug 25, 8:18 AM EDT | Severe Thunderstorm Warning | PBZ | Fayette, Westmoreland | 27 min |
| Aug 25, 8:23 AM EDT | Severe Thunderstorm Warning | CTP | Somerset | 82 min |
| Aug 25, 9:05 AM EDT | Severe Thunderstorm Warning | PBZ | Fayette | 25 min |
| Aug 25, 11:55 AM EDT | Severe Thunderstorm Warning | CLE | Crawford | 35 min |
| Aug 25, 11:58 AM EDT | Severe Thunderstorm Warning | PBZ | Mercer, Venango | 32 min |
| Aug 25, 12:29 PM EDT | Severe Thunderstorm Warning | PBZ | Armstrong, Butler, Clarion, Forest, Mercer, Venango | 46 min |
| Aug 25, 1:12 PM EDT | Severe Thunderstorm Warning | PBZ | Armstrong, Butler, Clarion, Mercer, Venango | 48 min |
| Aug 25, 1:36 PM EDT | Severe Thunderstorm Warning | PBZ | Armstrong, Butler, Clarion | 39 min |
| Aug 25, 2:07 PM EDT | Severe Thunderstorm Warning | PBZ | Armstrong, Butler, Clarion, Mercer, Venango | 38 min |
| Aug 25, 2:09 PM EDT | Severe Thunderstorm Warning | PBZ | Allegheny, Armstrong, Butler, Indiana, Westmoreland | 51 min |
| Aug 25, 2:26 PM EDT | Severe Thunderstorm Warning | PBZ | Fayette | 23 min |
| Aug 25, 2:29 PM EDT | Severe Thunderstorm Warning | BGM | Susquehanna, Wayne | 61 min |
| Aug 25, 2:34 PM EDT | Severe Thunderstorm Warning | PBZ | Allegheny, Armstrong, Indiana, Westmoreland | 41 min |
| Aug 25, 3:00 PM EDT | Severe Thunderstorm Warning | CTP | Cambria, Somerset | 75 min |
| Aug 25, 3:07 PM EDT | Severe Thunderstorm Warning | PBZ | Greene, Washington | 38 min |
| Aug 25, 3:15 PM EDT | Severe Thunderstorm Warning | PBZ | Armstrong, Fayette, Indiana, Westmoreland | 45 min |
| Aug 25, 3:39 PM EDT | Severe Thunderstorm Warning | PBZ | Fayette, Greene, Washington | 51 min |
| Aug 25, 3:49 PM EDT | Severe Thunderstorm Warning | CTP | Bedford | 56 min |
| Aug 25, 4:13 PM EDT | Severe Thunderstorm Warning | PBZ | Westmoreland | 32 min |
| Aug 25, 4:20 PM EDT | Severe Thunderstorm Warning | PBZ | Fayette, Greene | 40 min |
| Aug 25, 4:21 PM EDT | Severe Thunderstorm Warning | CTP | Somerset | 84 min |
| Aug 25, 5:01 PM EDT | Severe Thunderstorm Warning | PBZ | Allegheny, Fayette, Washington, Westmoreland | 29 min |
| Aug 25, 5:05 PM EDT | Severe Thunderstorm Warning | PBZ | Fayette, Westmoreland | 25 min |
| Aug 25, 5:57 PM EDT | Severe Thunderstorm Warning | PHI | Monroe, Northampton | 18 min |
| Aug 27, 2:59 PM EDT | Severe Thunderstorm Warning | BGM | Wayne | 46 min |
| Aug 27, 3:46 PM EDT | Severe Thunderstorm Warning | BGM | Wayne | 59 min |
| Aug 27, 4:44 PM EDT | Severe Thunderstorm Warning | PBZ | Beaver, Butler, Lawrence, Mercer | 46 min |
| Aug 27, 4:52 PM EDT | Severe Thunderstorm Warning | BGM | Susquehanna | 38 min |
| Aug 27, 4:56 PM EDT | Severe Thunderstorm Warning | BGM | Wayne | 64 min |
| Aug 27, 4:56 PM EDT | Severe Thunderstorm Warning | PBZ | Armstrong, Butler, Clarion, Lawrence, Mercer, Venango | 34 min |
| Aug 27, 5:00 PM EDT | Severe Thunderstorm Warning | CTP | McKean, Warren | 53 min |
| Aug 27, 5:23 PM EDT | Severe Thunderstorm Warning | BGM | Susquehanna, Wayne | 37 min |
| Aug 27, 5:26 PM EDT | Severe Thunderstorm Warning | PBZ | Allegheny, Armstrong, Beaver, Butler, Clarion, Indiana and 2 more | 64 min |
| Aug 27, 5:30 PM EDT | Severe Thunderstorm Warning | CTP | Clearfield | 75 min |
| Aug 27, 5:33 PM EDT | Severe Thunderstorm Warning | PBZ | Beaver, Lawrence | 42 min |
| Aug 27, 5:35 PM EDT | Severe Thunderstorm Warning | CTP | McKean, Potter | 55 min |
| Aug 27, 5:40 PM EDT | Severe Thunderstorm Warning | PBZ | Armstrong, Indiana, Jefferson | 50 min |
| Aug 27, 5:50 PM EDT | Severe Thunderstorm Warning | BGM | Susquehanna, Wayne | 55 min |
| Aug 27, 5:50 PM EDT | Severe Thunderstorm Warning | CTP | Cameron, Elk | 35 min |
| Aug 27, 5:58 PM EDT | Severe Thunderstorm Warning | CTP | Tioga | 57 min |
| Aug 27, 6:08 PM EDT | Severe Thunderstorm Warning | PBZ | Allegheny, Beaver, Washington | 52 min |
| Aug 27, 6:09 PM EDT | Severe Thunderstorm Warning | CTP | Cameron, Clearfield, Clinton | 32 min |
| Aug 27, 6:11 PM EDT | Severe Thunderstorm Warning | PBZ | Beaver, Washington | 49 min |
| Aug 27, 6:15 PM EDT | Severe Thunderstorm Warning | CTP | Blair, Cambria, Centre, Huntingdon | 75 min |
| Aug 27, 6:38 PM EDT | Severe Thunderstorm Warning | CTP | Centre, Clinton, Union | 43 min |
| Aug 27, 6:41 PM EDT | Severe Thunderstorm Warning | PBZ | Allegheny, Fayette, Washington, Westmoreland | 64 min |
| Aug 27, 6:47 PM EDT | Severe Thunderstorm Warning | CTP | Somerset | 58 min |
| Aug 27, 6:52 PM EDT | Severe Thunderstorm Warning | CTP | Snyder | 39 min |
| Aug 27, 7:09 PM EDT | Severe Thunderstorm Warning | CTP | Bedford, Somerset | 66 min |
| Aug 27, 7:10 PM EDT | Severe Thunderstorm Warning | PBZ | Washington | 50 min |
| Aug 27, 7:12 PM EDT | Severe Thunderstorm Warning | CTP | Montour, Northumberland | 34 min |
| Aug 27, 7:29 PM EDT | Severe Thunderstorm Warning | CTP | Franklin, Fulton, Huntingdon | 44 min |
| Aug 27, 7:29 PM EDT | Severe Thunderstorm Warning | CTP | Columbia, Schuylkill | 47 min |
| Aug 27, 7:40 PM EDT | Severe Thunderstorm Warning | PBZ | Fayette, Greene, Washington, Westmoreland | 65 min |
| Aug 27, 7:51 PM EDT | Severe Thunderstorm Warning | PHI | Berks, Carbon, Lehigh, Northampton | 39 min |
| Aug 27, 8:05 PM EDT | Severe Thunderstorm Warning | CTP | Somerset | 70 min |
| Aug 27, 8:13 PM EDT | Severe Thunderstorm Warning | PHI | Bucks, Lehigh, Northampton | 47 min |
| Aug 27, 8:26 PM EDT | Severe Thunderstorm Warning | PHI | Berks, Bucks, Chester, Lehigh, Montgomery | 26 min |
| Aug 27, 8:29 PM EDT | Severe Thunderstorm Warning | PHI | Bucks | 46 min |
| Aug 27, 8:42 PM EDT | Severe Thunderstorm Warning | PBZ | Fayette, Greene | 48 min |
| Aug 28, 8:56 AM EDT | Severe Thunderstorm Warning | PBZ | Butler, Lawrence, Mercer, Venango | 49 min |
| Aug 28, 9:40 AM EDT | Severe Thunderstorm Warning | PBZ | Armstrong, Butler, Clarion, Lawrence, Mercer, Venango | 50 min |
| Aug 28, 10:27 AM EDT | Severe Thunderstorm Warning | PBZ | Armstrong, Clarion, Indiana, Jefferson | 48 min |
| Aug 28, 11:41 AM EDT | Severe Thunderstorm Warning | CTP | Blair, Cambria, Clearfield | 64 min |
| Aug 28, 12:46 PM EDT | Severe Thunderstorm Warning | CTP | Bedford, Blair, Cambria, Huntingdon, Somerset | 59 min |
| Aug 28, 1:09 PM EDT | Severe Thunderstorm Warning | CTP | Huntingdon, Mifflin | 51 min |
| Aug 28, 1:29 PM EDT | Severe Thunderstorm Warning | CTP | Bedford, Blair, Franklin, Fulton, Huntingdon, Somerset | 61 min |
| Aug 28, 1:35 PM EDT | Severe Thunderstorm Warning | CTP | Juniata, Mifflin, Perry | 55 min |
| Aug 28, 1:48 PM EDT | Severe Thunderstorm Warning | CTP | Columbia, Northumberland, Schuylkill | 42 min |
| Aug 28, 2:16 PM EDT | Severe Thunderstorm Warning | CTP | Adams, Cumberland, Franklin, York | 59 min |
| Aug 28, 2:46 PM EDT | Severe Thunderstorm Warning | PBZ | Washington | 29 min |
| Aug 28, 2:53 PM EDT | Severe Thunderstorm Warning | CTP | Lancaster, Lebanon | 52 min |
| Aug 28, 3:00 PM EDT | Severe Thunderstorm Warning | CTP | Adams, Cumberland, Franklin, York | 60 min |
| Aug 28, 3:03 PM EDT | Severe Thunderstorm Warning | PBZ | Fayette | 42 min |
| Aug 28, 3:06 PM EDT | Severe Thunderstorm Warning | PBZ | Washington | 24 min |
| Aug 28, 3:22 PM EDT | Severe Thunderstorm Warning | PHI | Berks, Bucks, Chester, Lehigh, Montgomery | 53 min |
| Aug 28, 3:35 PM EDT | Severe Thunderstorm Warning | CTP | Lancaster, York | 54 min |
| Aug 28, 3:36 PM EDT | Severe Thunderstorm Warning | PHI | Berks, Chester | 54 min |
| Aug 28, 3:52 PM EDT | Severe Thunderstorm Warning | PHI | Chester, Delaware | 53 min |
| Aug 28, 3:56 PM EDT | Severe Thunderstorm Warning | PHI | Bucks, Chester, Delaware, Montgomery, Philadelphia | 49 min |
| Aug 28, 4:01 PM EDT | Severe Thunderstorm Warning | PHI | Chester, Delaware | 44 min |
| Aug 28, 4:39 PM EDT | Severe Thunderstorm Warning | PHI | Delaware, Montgomery, Philadelphia | 66 min |
| Aug 29, 5:22 PM EDT | Severe Thunderstorm Warning | BGM | Luzerne | 23 min |
| Aug 29, 6:26 PM EDT | Severe Thunderstorm Warning | PHI | Carbon, Lehigh, Monroe, Northampton | 64 min |
| Aug 29, 7:16 PM EDT | Severe Thunderstorm Warning | PHI | Berks, Bucks, Lehigh, Montgomery, Northampton | 59 min |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Armstrong County15
- Chester County14
- Westmoreland County13
- Bucks County12
- Delaware County12
- Butler County12
- Fayette County12
- Northampton County10
- Washington County10
- Lehigh County9
- Philadelphia County9
- Allegheny County9
- Montgomery County9
- Clarion County9
- Wayne County8
- Somerset County8
- Mercer County8
- Lawrence County7
- Indiana County7
- Venango County7
- Beaver County6
- Berks County6
- Carbon County6
- Monroe County6
- Franklin County5
- Greene County5
- Huntingdon County5
- Luzerne County4
- Susquehanna County4
- Cambria County4
- Bedford County4
- Blair County4
- Clinton County3
- Columbia County3
- Schuylkill County3
- Mifflin County3
- Lancaster County3
- Clearfield County3
- York County3
- Lycoming County2
23 more counties
- Union County2
- Warren County2
- Tioga County2
- McKean County2
- Jefferson County2
- Cameron County2
- Centre County2
- Northumberland County2
- Fulton County2
- Adams County2
- Cumberland County2
- Lackawanna County1
- Wyoming County1
- Pike County1
- Crawford County1
- Forest County1
- Potter County1
- Elk County1
- Snyder County1
- Montour County1
- Juniata County1
- Perry County1
- Lebanon County1
Nearby
Alerts in force nowTornadoes on recordThe radar archive20192021
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.