Alert archive / Pennsylvania / Flash Flood Warnings
Flash Flood Warnings in Pennsylvania, 2024
125 flash flood warnings in 2024. 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 flash flood warnings reaches back to 1986.
Flash Flood Warnings by county
Each county as a circle sized by its count in 2024. Tap one for its archive.
- Flash Flood Warnings
- 125
- Busiest month
- August68 flash flood warnings
- Busiest day
- August 9, 202421 flash flood 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 |
|---|---|---|---|---|
| Apr 2, 8:35 AM EDT | Flash Flood Warning | PBZ | Allegheny, Washington | 7 hr |
| Apr 2, 11:33 AM EDT | Flash Flood Warning | PBZ | Armstrong, Indiana, Jefferson | 3 hr |
| Apr 2, 9:51 PM EDT | Flash Flood Warning | PBZ | Allegheny, Armstrong, Beaver, Butler, Clarion, Fayette and 5 more | 6 hr |
| Apr 11, 5:12 PM EDT | Flash Flood Warning | PBZ | Greene, Washington | 8 hr |
| Apr 11, 5:32 PM EDT | Flash Flood Warning | PBZ | Allegheny, Beaver, Butler, Lawrence, Washington | 7 hr |
| Apr 11, 5:58 PM EDT | Flash Flood Warning | PBZ | Allegheny, Greene, Washington | 7 hr |
| Apr 11, 7:07 PM EDT | Flash Flood Warning | PBZ | Allegheny, Washington | 5 hr |
| Apr 11, 7:14 PM EDT | Flash Flood Warning | PBZ | Allegheny, Fayette, Greene, Washington | 6 hr |
| Apr 11, 9:10 PM EDT | Flash Flood Warning | PBZ | Allegheny, Armstrong, Butler, Fayette, Greene, Indiana and 1 more | 4 hr |
| Apr 11, 9:45 PM EDT | Flash Flood Warning | PBZ | Armstrong, Butler, Clarion, Forest, Lawrence, Mercer and 1 more | 3 hr |
| Apr 14, 7:22 PM EDT | Flash Flood Warning | PBZ | Armstrong, Butler, Clarion, Lawrence, Mercer | 3 hr |
| Apr 14, 8:28 PM EDT | Flash Flood Warning | PBZ | Armstrong, Butler, Clarion, Indiana, Jefferson, Lawrence and 1 more | 3 hr |
| May 5, 7:33 PM EDT | Flash Flood Warning | PBZ | Allegheny, Washington, Westmoreland | 2 hr |
| May 8, 1:48 AM EDT | Flash Flood Warning | PBZ | Allegheny, Beaver, Washington, Westmoreland | 3 hr |
| May 15, 8:28 PM EDT | Flash Flood Warning | PBZ | Allegheny | 113 min |
| May 17, 5:17 PM EDT | Flash Flood Warning | PBZ | Allegheny | 3 hr |
| May 18, 4:13 AM EDT | Flash Flood Warning | PBZ | Allegheny | 4 hr |
| May 25, 4:09 PM EDT | Flash Flood Warning | PBZ | Allegheny, Armstrong, Butler, Indiana, Westmoreland | 3 hr |
| May 25, 9:32 PM EDT | Flash Flood Warning | PBZ | Fayette, Greene | 3 hr |
| May 25, 10:46 PM EDT | Flash Flood Warning | PBZ | Fayette, Greene | 3 hr |
| May 29, 6:25 PM EDT | Flash Flood Warning | PBZ | Westmoreland | 74 min |
| Jun 4, 3:34 PM EDT | Flash Flood Warning | PBZ | Fayette | 104 min |
| Jun 5, 11:27 PM EDT | Flash Flood Warning | PHI | Chester | 3 hr |
| Jun 14, 5:07 PM EDT | Flash Flood Warning | PHI | Chester | 4 hr |
| Jun 14, 5:59 PM EDT | Flash Flood Warning | PHI | Bucks, Montgomery, Philadelphia | 4 hr |
| Jun 19, 11:58 PM EDT | Flash Flood Warning | PBZ | Forest | 49 min |
| Jun 20, 3:18 PM EDT | Flash Flood Warning | CTP | Potter | 117 min |
| Jun 20, 4:17 PM EDT | Flash Flood Warning | CTP | Potter | 77 min |
| Jun 21, 8:12 PM EDT | Flash Flood Warning | BGM | Lackawanna, Luzerne | 93 min |
| Jun 22, 8:55 PM EDT | Flash Flood Warning | PHI | Northampton | 4 hr |
| Jun 26, 3:05 PM EDT | Flash Flood Warning | CLE | Crawford, Erie | 4 hr |
| Jun 26, 3:33 PM EDT | Flash Flood Warning | CTP | McKean, Warren | 2 hr |
| Jun 26, 6:45 PM EDT | Flash Flood Warning | BGM | Bradford, Susquehanna | 2 hr |
| Jun 26, 7:34 PM EDT | Flash Flood Warning | PBZ | Allegheny | 116 min |
| Jun 29, 10:23 PM EDT | Flash Flood Warning | PHI | Chester | 4 hr |
| Jun 30, 5:19 PM EDT | Flash Flood Warning | PHI | Chester, Delaware, Philadelphia | 3 hr |
| Jun 30, 5:54 PM EDT | Flash Flood Warning | PHI | Delaware, Philadelphia | 3 hr |
| Jul 4, 8:29 PM EDT | Flash Flood Warning | PHI | Berks | 2 hr |
| Jul 4, 9:01 PM EDT | Flash Flood Warning | PBZ | Indiana | 42 min |
| Jul 9, 4:17 PM EDT | Flash Flood Warning | PHI | Berks | 3 hr |
| Jul 10, 7:35 PM EDT | Flash Flood Warning | BGM | Bradford | 3 hr |
| Jul 10, 8:31 PM EDT | Flash Flood Warning | BGM | Luzerne | 3 hr |
| Jul 10, 9:47 PM EDT | Flash Flood Warning | BGM | Luzerne, Wyoming | 115 min |
| Jul 14, 2:53 PM EDT | Flash Flood Warning | PHI | Chester | 3 hr |
| Jul 17, 4:15 PM EDT | Flash Flood Warning | BGM | Bradford | 2 hr |
| Jul 17, 5:07 PM EDT | Flash Flood Warning | BGM | Lackawanna, Susquehanna, Wyoming | 3 hr |
| Jul 17, 7:18 PM EDT | Flash Flood Warning | PHI | Carbon, Lehigh, Monroe, Northampton | 2 hr |
| Jul 17, 9:21 PM EDT | Flash Flood Warning | PHI | Bucks, Philadelphia | 2 hr |
| Jul 21, 7:59 PM EDT | Flash Flood Warning | PHI | Philadelphia | 112 min |
| Jul 22, 3:25 AM EDT | Flash Flood Warning | PHI | Berks | 3 hr |
| Jul 22, 3:04 PM EDT | Flash Flood Warning | BGM | Bradford | 3 hr |
| Jul 24, 12:07 PM EDT | Flash Flood Warning | PHI | Montgomery, Philadelphia | 3 hr |
| Jul 24, 3:34 PM EDT | Flash Flood Warning | BGM | Luzerne | 89 min |
| Aug 2, 9:40 PM EDT | Flash Flood Warning | PHI | Delaware, Philadelphia | 4 hr |
| Aug 3, 12:47 PM EDT | Flash Flood Warning | CTP | Cumberland | 2 hr |
| Aug 3, 1:42 PM EDT | Flash Flood Warning | CTP | Perry | 76 min |
| Aug 3, 2:53 PM EDT | Flash Flood Warning | BGM | Luzerne | 4 hr |
| Aug 3, 2:53 PM EDT | Flash Flood Warning | PHI | Carbon | 117 min |
| Aug 3, 3:23 PM EDT | Flash Flood Warning | BGM | Pike, Wayne | 3 hr |
| Aug 3, 3:35 PM EDT | Flash Flood Warning | BGM | Bradford, Lackawanna, Luzerne, Susquehanna, Wyoming | 4 hr |
| Aug 5, 6:10 PM EDT | Flash Flood Warning | BGM | Bradford, Susquehanna | 3 hr |
| Aug 6, 2:00 PM EDT | Flash Flood Warning | PBZ | Butler, Lawrence, Mercer | 3 hr |
| Aug 6, 2:37 PM EDT | Flash Flood Warning | PBZ | Armstrong, Indiana, Jefferson | 3 hr |
| Aug 6, 3:19 PM EDT | Flash Flood Warning | PBZ | Allegheny, Armstrong, Beaver, Butler, Westmoreland | 6 hr |
| Aug 6, 3:39 PM EDT | Flash Flood Warning | PBZ | Indiana | 2 hr |
| Aug 6, 4:02 PM EDT | Flash Flood Warning | BGM | Luzerne | 3 hr |
| Aug 6, 4:07 PM EDT | Flash Flood Warning | CTP | Lancaster | 2 hr |
| Aug 6, 4:32 PM EDT | Flash Flood Warning | PHI | Chester, Delaware, Montgomery | 8 hr |
| Aug 6, 6:37 PM EDT | Flash Flood Warning | PHI | Carbon, Lehigh, Monroe, Northampton | 3 hr |
| Aug 6, 6:57 PM EDT | Flash Flood Warning | PHI | Monroe, Northampton | 3 hr |
| Aug 6, 7:32 PM EDT | Flash Flood Warning | PHI | Berks | 3 hr |
| Aug 6, 7:34 PM EDT | Flash Flood Warning | PBZ | Allegheny, Beaver | 82 min |
| Aug 6, 8:29 PM EDT | Flash Flood Warning | PHI | Bucks, Delaware, Montgomery, Philadelphia | 4 hr |
| Aug 6, 9:12 PM EDT | Flash Flood Warning | PHI | Bucks, Philadelphia | 3 hr |
| Aug 8, 5:48 PM EDT | Flash Flood Warning | PHI | Chester | 6 hr |
| Aug 8, 8:52 PM EDT | Flash Flood Warning | PHI | Berks, Chester | 3 hr |
| Aug 9, 12:12 AM EDT | Flash Flood Warning | CTP | Bedford, Fulton | 3 hr |
| Aug 9, 4:30 AM EDT | Flash Flood Warning | CTP | Cumberland, Dauphin, York | 99 min |
| Aug 9, 7:06 AM EDT | Flash Flood Warning | CTP | Lycoming, Union | 2 hr |
| Aug 9, 7:52 AM EDT | Flash Flood Warning | BGM | Susquehanna | 8 hr |
| Aug 9, 7:52 AM EDT | Flash Flood Warning | CTP | Lycoming, Tioga | 2 hr |
| Aug 9, 8:44 AM EDT | Flash Flood Warning | CTP | Adams, York | 2 hr |
| Aug 9, 8:54 AM EDT | Flash Flood Warning | CTP | Tioga | 6 hr |
| Aug 9, 9:18 AM EDT | Flash Flood Warning | CTP | Cumberland, Dauphin, York | 117 min |
| Aug 9, 10:07 AM EDT | Flash Flood Warning | CTP | York | 113 min |
| Aug 9, 10:58 AM EDT | Flash Flood Warning | CTP | Potter, Tioga | 6 hr |
| Aug 9, 11:33 AM EDT | Flash Flood Warning | BGM | Bradford, Luzerne, Susquehanna, Wyoming | 4 hr |
| Aug 9, 12:34 PM EDT | Flash Flood Warning | CTP | Lycoming | 116 min |
| Aug 9, 12:45 PM EDT | Flash Flood Warning | BGM | Lackawanna, Luzerne, Wyoming | 4 hr |
| Aug 9, 12:45 PM EDT | Flash Flood Warning | CTP | Sullivan | 3 hr |
| Aug 9, 1:33 PM EDT | Flash Flood Warning | BGM | Susquehanna, Wayne | 4 hr |
| Aug 9, 2:50 PM EDT | Flash Flood Warning | PHI | Lehigh, Northampton | 2 hr |
| Aug 9, 3:31 PM EDT | Flash Flood Warning | PHI | Monroe, Northampton | 108 min |
| Aug 9, 3:50 PM EDT | Flash Flood Warning | PHI | Bucks, Montgomery | 2 hr |
| Aug 9, 4:11 PM EDT | Flash Flood Warning | PHI | Northampton | 100 min |
| Aug 9, 5:30 PM EDT | Flash Flood Warning | PHI | Bucks | 83 min |
| Aug 17, 12:42 PM EDT | Flash Flood Warning | CTP | Centre, Clinton | 101 min |
| Aug 17, 6:05 PM EDT | Flash Flood Warning | CLE | Crawford | 4 hr |
| Aug 17, 8:04 PM EDT | Flash Flood Warning | CTP | Blair, Centre, Huntingdon | 3 hr |
| Aug 17, 8:47 PM EDT | Flash Flood Warning | CTP | Centre, Huntingdon | 3 hr |
| Aug 18, 1:35 AM EDT | Flash Flood Warning | PHI | Bucks, Delaware, Montgomery, Philadelphia | 2 hr |
| Aug 18, 2:02 AM EDT | Flash Flood Warning | CTP | Clearfield | 118 min |
| Aug 18, 3:09 AM EDT | Flash Flood Warning | PHI | Bucks | 93 min |
| Aug 18, 2:21 PM EDT | Flash Flood Warning | BGM | Lackawanna, Susquehanna, Wayne | 9 hr |
| Aug 18, 4:56 PM EDT | Flash Flood Warning | PHI | Monroe, Northampton | 6 hr |
| Aug 18, 5:31 PM EDT | Flash Flood Warning | PHI | Bucks, Lehigh, Northampton | 6 hr |
| Aug 18, 5:37 PM EDT | Flash Flood Warning | BGM | Susquehanna | 3 hr |
| Aug 18, 5:42 PM EDT | Flash Flood Warning | BGM | Lackawanna, Susquehanna, Wyoming | 5 hr |
| Aug 18, 6:37 PM EDT | Flash Flood Warning | BGM | Susquehanna | 3 hr |
| Aug 18, 8:28 PM EDT | Flash Flood Warning | PHI | Berks, Lehigh | 3 hr |
| Aug 18, 8:35 PM EDT | Flash Flood Warning | CTP | Lancaster | 2 hr |
| Aug 29, 3:53 PM EDT | Flash Flood Warning | CTP | Somerset | 2 hr |
| Aug 29, 3:59 PM EDT | Flash Flood Warning | CTP | Bedford | 2 hr |
| Aug 29, 4:57 PM EDT | Flash Flood Warning | CTP | Cambria | 2 hr |
| Aug 29, 5:11 PM EDT | Flash Flood Warning | PBZ | Washington | 77 min |
| Aug 29, 7:27 PM EDT | Flash Flood Warning | CTP | Clinton | 3 hr |
| Aug 29, 10:27 PM EDT | Flash Flood Warning | CTP | Juniata, Mifflin | 4 hr |
| Aug 29, 10:48 PM EDT | Flash Flood Warning | CTP | Juniata, Perry | 3 hr |
| Aug 29, 11:14 PM EDT | Flash Flood Warning | PHI | Delaware | 3 hr |
| Aug 31, 3:33 PM EDT | Flash Flood Warning | CTP | Bedford, Cambria, Somerset | 2 hr |
| Aug 31, 7:30 PM EDT | Flash Flood Warning | PBZ | Allegheny, Washington, Westmoreland | 85 min |
| Sep 21, 7:02 PM EDT | Flash Flood Warning | CTP | Potter, Tioga | 3 hr |
| Sep 21, 10:00 PM EDT | Flash Flood Warning | CTP | Dauphin | 110 min |
| Sep 21, 10:37 PM EDT | Flash Flood Warning | CTP | Dauphin | 113 min |
| Sep 21, 10:44 PM EDT | Flash Flood Warning | CTP | Northumberland, Union | 2 hr |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Allegheny County17
- Washington County11
- Susquehanna County11
- Philadelphia County10
- Armstrong County9
- Butler County9
- Bucks County9
- Luzerne County9
- Northampton County9
- Indiana County8
- Westmoreland County8
- Chester County8
- Greene County7
- Bradford County7
- Delaware County7
- Fayette County6
- Lawrence County6
- Montgomery County6
- Lackawanna County6
- Berks County6
- Wyoming County6
- Beaver County5
- Lehigh County5
- Monroe County5
- Clarion County4
- Mercer County4
- Potter County4
- Dauphin County4
- York County4
- Tioga County4
- Jefferson County3
- Carbon County3
- Cumberland County3
- Wayne County3
- Bedford County3
- Lycoming County3
- Centre County3
- Forest County2
- Crawford County2
- Perry County2
19 more counties
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordThe radar archive20232025
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.