Alert archive / Pennsylvania / Severe Thunderstorm Warnings / 2020
Severe Thunderstorm Warnings in Pennsylvania, April 2020
47 severe thunderstorm warnings in April 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 April 2020. Tap one for its archive.
- Severe Thunderstorm Warnings
- 47
- Busiest day
- April 8, 202017 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 |
|---|---|---|---|---|
| Apr 7, 10:21 PM EDT | Severe Thunderstorm Warning | CLE | Crawford | 40 min |
| Apr 7, 11:12 PM EDT | Severe Thunderstorm Warning | CLE | Crawford, Erie | 63 min |
| Apr 7, 11:27 PM EDT | Severe Thunderstorm Warning | PBZ | Forest | 33 min |
| Apr 7, 11:31 PM EDT | Severe Thunderstorm Warning | PBZ | Forest, Venango | 29 min |
| Apr 7, 11:35 PM EDT | Severe Thunderstorm Warning | PBZ | Lawrence, Mercer | 40 min |
| Apr 7, 11:44 PM EDT | Severe Thunderstorm Warning | CTP | Warren | 61 min |
| Apr 7, 11:47 PM EDT | Severe Thunderstorm Warning | PBZ | Butler, Mercer, Venango | 43 min |
| Apr 8, 12:23 AM EDT | Severe Thunderstorm Warning | PBZ | Beaver, Butler, Lawrence | 52 min |
| Apr 8, 12:30 AM EDT | Severe Thunderstorm Warning | PBZ | Butler, Lawrence, Mercer | 30 min |
| Apr 8, 12:47 AM EDT | Severe Thunderstorm Warning | PBZ | Allegheny, Beaver, Butler, Washington | 43 min |
| Apr 8, 1:11 AM EDT | Severe Thunderstorm Warning | PBZ | Allegheny, Butler, Indiana, Washington, Westmoreland | 49 min |
| Apr 8, 1:22 AM EDT | Severe Thunderstorm Warning | PBZ | Allegheny, Armstrong, Indiana, Washington, Westmoreland | 39 min |
| Apr 8, 1:39 AM EDT | Severe Thunderstorm Warning | PBZ | Allegheny, Fayette, Indiana, Washington, Westmoreland | 51 min |
| Apr 8, 1:44 AM EDT | Severe Thunderstorm Warning | CTP | Cambria, Somerset | 61 min |
| Apr 8, 2:26 AM EDT | Severe Thunderstorm Warning | CTP | Bedford, Fulton, Huntingdon | 49 min |
| Apr 8, 2:30 AM EDT | Severe Thunderstorm Warning | PHI | Chester, Delaware, Montgomery, Philadelphia | 30 min |
| Apr 8, 2:51 AM EDT | Severe Thunderstorm Warning | CTP | Franklin | 39 min |
| Apr 9, 12:01 PM EDT | Severe Thunderstorm Warning | CTP | Lancaster, Lebanon | 29 min |
| Apr 9, 12:23 PM EDT | Severe Thunderstorm Warning | PHI | Berks, Bucks, Chester, Lehigh, Montgomery | 52 min |
| Apr 9, 12:56 PM EDT | Severe Thunderstorm Warning | CTP | Lancaster | 34 min |
| Apr 9, 1:00 PM EDT | Severe Thunderstorm Warning | PHI | Bucks, Chester, Delaware, Montgomery, Philadelphia | 45 min |
| Apr 9, 1:12 PM EDT | Severe Thunderstorm Warning | PHI | Chester, Delaware, Philadelphia | 48 min |
| Apr 9, 1:23 PM EDT | Severe Thunderstorm Warning | PHI | Bucks | 52 min |
| Apr 9, 1:26 PM EDT | Severe Thunderstorm Warning | PHI | Berks, Bucks, Chester, Delaware, Montgomery, Philadelphia | 49 min |
| Apr 9, 1:33 PM EDT | Severe Thunderstorm Warning | PHI | Bucks, Delaware, Philadelphia | 42 min |
| Apr 9, 11:18 PM EDT | Severe Thunderstorm Warning | CTP | Lancaster, York | 42 min |
| Apr 9, 11:24 PM EDT | Severe Thunderstorm Warning | PHI | Chester | 36 min |
| Apr 9, 11:49 PM EDT | Severe Thunderstorm Warning | PHI | Chester, Delaware, Philadelphia | 41 min |
| Apr 13, 11:18 AM EDT | Severe Thunderstorm Warning | PBZ | Fayette, Greene | 27 min |
| Apr 13, 11:48 AM EDT | Severe Thunderstorm Warning | CTP | Cambria, Clearfield, Somerset | 72 min |
| Apr 13, 12:16 PM EDT | Severe Thunderstorm Warning | CTP | Bedford, Franklin, Fulton | 44 min |
| Apr 13, 12:32 PM EDT | Severe Thunderstorm Warning | CTP | Franklin, Fulton | 58 min |
| Apr 13, 12:45 PM EDT | Severe Thunderstorm Warning | CTP | Blair, Cambria, Centre, Clearfield, Huntingdon | 45 min |
| Apr 13, 12:52 PM EDT | Severe Thunderstorm Warning | CTP | Lancaster, York | 38 min |
| Apr 13, 1:06 PM EDT | Severe Thunderstorm Warning | CTP | Adams | 53 min |
| Apr 13, 1:25 PM EDT | Severe Thunderstorm Warning | CTP | Centre, Clinton, Huntingdon, Mifflin | 50 min |
| Apr 13, 1:27 PM EDT | Severe Thunderstorm Warning | PHI | Chester | 33 min |
| Apr 13, 1:37 PM EDT | Severe Thunderstorm Warning | CTP | Adams, York | 68 min |
| Apr 13, 2:04 PM EDT | Severe Thunderstorm Warning | CTP | Centre, Clinton, Juniata, Lycoming, Mifflin, Perry and 2 more | 41 min |
| Apr 13, 2:13 PM EDT | Severe Thunderstorm Warning | CTP | Lancaster | 58 min |
| Apr 13, 2:41 PM EDT | Severe Thunderstorm Warning | BGM | Bradford | 49 min |
| Apr 13, 2:41 PM EDT | Severe Thunderstorm Warning | PHI | Chester, Delaware | 64 min |
| Apr 13, 3:10 PM EDT | Severe Thunderstorm Warning | BGM | Bradford, Susquehanna, Wyoming | 43 min |
| Apr 21, 1:04 PM EDT | Severe Thunderstorm Warning | PHI | Bucks, Chester, Delaware, Montgomery, Northampton, Philadelphia | 26 min |
| Apr 21, 1:28 PM EDT | Severe Thunderstorm Warning | PHI | Bucks, Montgomery, Philadelphia | 32 min |
| Apr 21, 1:49 PM EDT | Severe Thunderstorm Warning | PHI | Chester, Delaware, Philadelphia | 56 min |
| Apr 21, 1:59 PM EDT | Severe Thunderstorm Warning | PHI | Bucks, Montgomery, Philadelphia | 61 min |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Chester County11
- Philadelphia County10
- Delaware County9
- Bucks County8
- Montgomery County7
- Butler County5
- Lancaster County5
- Allegheny County4
- Washington County4
- Lawrence County3
- Mercer County3
- Indiana County3
- Westmoreland County3
- Cambria County3
- Fulton County3
- Huntingdon County3
- Franklin County3
- York County3
- Centre County3
- Crawford County2
- Forest County2
- Venango County2
- Beaver County2
- Fayette County2
- Somerset County2
- Bedford County2
- Berks County2
- Clearfield County2
- Adams County2
- Clinton County2
- Mifflin County2
- Bradford County2
- Erie County1
- Warren County1
- Armstrong County1
- Lebanon County1
- Lehigh County1
- Greene County1
- Blair County1
- Juniata 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.