Alert archive / Pennsylvania / Flash Flood Warnings
Flash Flood Warnings in Pennsylvania, 2017
128 flash flood warnings in 2017. 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 2017. Tap one for its archive.
- Flash Flood Warnings
- 128
- Busiest month
- July70 flash flood warnings
- Busiest day
- July 24, 201721 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 |
|---|---|---|---|---|
| Jan 12, 7:33 AM EST | Flash Flood Warning | PBZ | Mercer, Venango | 3 hr |
| Jan 12, 8:06 AM EST | Flash Flood Warning | PBZ | Lawrence | 3 hr |
| Jan 12, 9:31 AM EST | Flash Flood Warning | PBZ | Armstrong, Butler, Clarion, Jefferson | 3 hr |
| Feb 25, 3:22 PM EST | Flash Flood Warning | BGM | Lackawanna, Luzerne | 3 hr |
| Feb 25, 4:13 PM EST | Flash Flood Warning | BGM | Lackawanna, Susquehanna, Wayne | 3 hr |
| May 1, 11:09 PM EDT | Flash Flood Warning | BGM | Lackawanna, Luzerne, Susquehanna, Wyoming | 111 min |
| May 5, 4:42 PM EDT | Flash Flood Warning | PBZ | Fayette | 2 hr |
| May 5, 5:30 PM EDT | Flash Flood Warning | PBZ | Fayette, Westmoreland | 2 hr |
| May 5, 6:34 PM EDT | Flash Flood Warning | PBZ | Armstrong, Clarion | 3 hr |
| May 28, 3:58 PM EDT | Flash Flood Warning | CLE | Crawford | 3 hr |
| May 28, 4:46 PM EDT | Flash Flood Warning | PBZ | Clarion | 119 min |
| May 28, 4:56 PM EDT | Flash Flood Warning | PBZ | Forest, Venango | 94 min |
| May 28, 5:06 PM EDT | Flash Flood Warning | CTP | Somerset | 3 hr |
| May 29, 12:59 AM EDT | Flash Flood Warning | CTP | Clearfield | 6 hr |
| Jun 13, 2:46 PM EDT | Flash Flood Warning | PBZ | Greene | 3 hr |
| Jun 13, 4:18 PM EDT | Flash Flood Warning | PBZ | Beaver, Lawrence | 3 hr |
| Jun 13, 4:21 PM EDT | Flash Flood Warning | PBZ | Allegheny, Westmoreland | 3 hr |
| Jun 13, 4:54 PM EDT | Flash Flood Warning | PBZ | Westmoreland | 3 hr |
| Jun 13, 7:14 PM EDT | Flash Flood Warning | PBZ | Allegheny | 5 hr |
| Jun 14, 4:30 PM EDT | Flash Flood Warning | PBZ | Allegheny, Washington, Westmoreland | 3 hr |
| Jun 14, 5:18 PM EDT | Flash Flood Warning | PBZ | Allegheny, Washington | 3 hr |
| Jun 15, 4:27 PM EDT | Flash Flood Warning | PBZ | Allegheny | 3 hr |
| Jun 15, 6:48 PM EDT | Flash Flood Warning | CTP | Cambria, Somerset | 3 hr |
| Jun 15, 8:22 PM EDT | Flash Flood Warning | CTP | Bedford, Blair | 3 hr |
| Jun 15, 8:43 PM EDT | Flash Flood Warning | PBZ | Allegheny, Washington | 3 hr |
| Jun 16, 2:43 PM EDT | Flash Flood Warning | PBZ | Allegheny | 3 hr |
| Jun 16, 3:02 PM EDT | Flash Flood Warning | PBZ | Allegheny | 3 hr |
| Jun 16, 3:34 PM EDT | Flash Flood Warning | PBZ | Westmoreland | 3 hr |
| Jun 16, 4:38 PM EDT | Flash Flood Warning | CTP | Cambria | 3 hr |
| Jun 16, 5:09 PM EDT | Flash Flood Warning | CTP | Centre | 3 hr |
| Jun 18, 6:25 PM EDT | Flash Flood Warning | CLE | Erie | 4 hr |
| Jun 18, 6:50 PM EDT | Flash Flood Warning | CLE | Erie | 11 hr |
| Jun 18, 11:41 PM EDT | Flash Flood Warning | CTP | Lycoming | 3 hr |
| Jun 19, 3:17 PM EDT | Flash Flood Warning | PHI | Monroe | 3 hr |
| Jun 19, 3:24 PM EDT | Flash Flood Warning | PHI | Carbon, Lehigh, Monroe, Northampton | 3 hr |
| Jun 22, 4:53 PM EDT | Flash Flood Warning | PBZ | Armstrong, Indiana | 10 hr |
| Jun 22, 5:52 PM EDT | Flash Flood Warning | PBZ | Indiana | 9 hr |
| Jun 23, 2:56 PM EDT | Flash Flood Warning | PBZ | Allegheny | 3 hr |
| Jun 23, 3:40 PM EDT | Flash Flood Warning | PBZ | Washington | 6 hr |
| Jun 23, 4:04 PM EDT | Flash Flood Warning | PBZ | Indiana | 6 hr |
| Jun 23, 4:27 PM EDT | Flash Flood Warning | PBZ | Fayette, Greene | 8 hr |
| Jun 23, 4:38 PM EDT | Flash Flood Warning | PBZ | Westmoreland | 8 hr |
| Jun 23, 8:55 PM EDT | Flash Flood Warning | PBZ | Fayette, Greene | 4 hr |
| Jun 24, 7:21 AM EDT | Flash Flood Warning | PHI | Bucks, Montgomery, Philadelphia | 4 hr |
| Jun 30, 10:37 PM EDT | Flash Flood Warning | PBZ | Mercer | 5 hr |
| Jul 1, 4:20 PM EDT | Flash Flood Warning | PHI | Berks, Lehigh | 4 hr |
| Jul 5, 10:27 PM EDT | Flash Flood Warning | PBZ | Butler | 4 hr |
| Jul 6, 3:43 PM EDT | Flash Flood Warning | PBZ | Allegheny | 3 hr |
| Jul 6, 4:39 PM EDT | Flash Flood Warning | PBZ | Allegheny, Washington | 3 hr |
| Jul 6, 5:08 PM EDT | Flash Flood Warning | PBZ | Butler | 3 hr |
| Jul 6, 5:28 PM EDT | Flash Flood Warning | PBZ | Beaver | 3 hr |
| Jul 13, 5:25 PM EDT | Flash Flood Warning | PHI | Berks, Lehigh | 3 hr |
| Jul 13, 5:31 PM EDT | Flash Flood Warning | PHI | Bucks | 3 hr |
| Jul 14, 2:30 AM EDT | Flash Flood Warning | PBZ | Indiana | 3 hr |
| Jul 14, 2:52 AM EDT | Flash Flood Warning | PBZ | Indiana | 6 hr |
| Jul 14, 6:16 AM EDT | Flash Flood Warning | PBZ | Fayette, Greene | 5 hr |
| Jul 14, 10:18 AM EDT | Flash Flood Warning | CTP | Cambria, Clearfield | 3 hr |
| Jul 14, 2:53 PM EDT | Flash Flood Warning | PHI | Chester, Delaware, Montgomery, Philadelphia | 3 hr |
| Jul 17, 1:41 PM EDT | Flash Flood Warning | PHI | Berks | 7 hr |
| Jul 17, 1:50 PM EDT | Flash Flood Warning | BGM | Luzerne | 3 hr |
| Jul 17, 2:34 PM EDT | Flash Flood Warning | BGM | Susquehanna | 6 hr |
| Jul 17, 2:41 PM EDT | Flash Flood Warning | CTP | York | 2 hr |
| Jul 17, 2:45 PM EDT | Flash Flood Warning | CTP | Schuylkill | 2 hr |
| Jul 17, 2:52 PM EDT | Flash Flood Warning | BGM | Lackawanna, Luzerne | 6 hr |
| Jul 17, 3:18 PM EDT | Flash Flood Warning | CTP | Lebanon | 117 min |
| Jul 20, 3:51 PM EDT | Flash Flood Warning | BGM | Bradford, Susquehanna | 6 hr |
| Jul 23, 4:50 PM EDT | Flash Flood Warning | CTP | York | 4 hr |
| Jul 23, 6:36 PM EDT | Flash Flood Warning | CTP | Dauphin, Lebanon | 3 hr |
| Jul 23, 6:53 PM EDT | Flash Flood Warning | PHI | Chester, Delaware | 14 hr |
| Jul 23, 7:20 PM EDT | Flash Flood Warning | PHI | Berks, Chester, Montgomery | 6 hr |
| Jul 23, 7:41 PM EDT | Flash Flood Warning | PHI | Bucks, Delaware, Montgomery, Philadelphia | 6 hr |
| Jul 23, 7:59 PM EDT | Flash Flood Warning | CTP | Dauphin, Northumberland | 3 hr |
| Jul 23, 8:23 PM EDT | Flash Flood Warning | PBZ | Armstrong, Butler | 3 hr |
| Jul 23, 8:56 PM EDT | Flash Flood Warning | PBZ | Clarion, Forest, Jefferson | 4 hr |
| Jul 23, 9:12 PM EDT | Flash Flood Warning | PBZ | Fayette, Washington, Westmoreland | 3 hr |
| Jul 23, 9:28 PM EDT | Flash Flood Warning | PBZ | Fayette, Westmoreland | 3 hr |
| Jul 23, 9:58 PM EDT | Flash Flood Warning | BGM | Bradford | 3 hr |
| Jul 23, 10:09 PM EDT | Flash Flood Warning | CTP | Cameron, Potter, Tioga | 4 hr |
| Jul 23, 10:13 PM EDT | Flash Flood Warning | BGM | Bradford | 2 hr |
| Jul 23, 11:35 PM EDT | Flash Flood Warning | BGM | Bradford, Susquehanna | 3 hr |
| Jul 23, 11:47 PM EDT | Flash Flood Warning | PBZ | Jefferson | 3 hr |
| Jul 23, 11:55 PM EDT | Flash Flood Warning | BGM | Susquehanna | 3 hr |
| Jul 24, 12:23 AM EDT | Flash Flood Warning | BGM | Bradford | 3 hr |
| Jul 24, 12:57 AM EDT | Flash Flood Warning | BGM | Bradford | 2 hr |
| Jul 24, 3:00 AM EDT | Flash Flood Warning | PHI | Delaware, Montgomery, Philadelphia | 4 hr |
| Jul 24, 2:17 PM EDT | Flash Flood Warning | BGM | Bradford, Susquehanna | 3 hr |
| Jul 24, 2:33 PM EDT | Flash Flood Warning | BGM | Susquehanna | 3 hr |
| Jul 24, 3:50 PM EDT | Flash Flood Warning | BGM | Susquehanna | 115 min |
| Jul 24, 4:42 PM EDT | Flash Flood Warning | CTP | Columbia, Montour, Northumberland, Union | 3 hr |
| Jul 24, 5:15 PM EDT | Flash Flood Warning | BGM | Bradford | 2 hr |
| Jul 24, 6:43 PM EDT | Flash Flood Warning | PHI | Berks, Lehigh, Northampton | 4 hr |
| Jul 24, 6:47 PM EDT | Flash Flood Warning | PHI | Berks | 4 hr |
| Jul 24, 7:23 PM EDT | Flash Flood Warning | PHI | Bucks, Lehigh, Montgomery | 4 hr |
| Jul 24, 9:44 PM EDT | Flash Flood Warning | PHI | Philadelphia | 4 hr |
| Jul 27, 6:01 PM EDT | Flash Flood Warning | PBZ | Fayette | 3 hr |
| Jul 28, 1:42 PM EDT | Flash Flood Warning | PBZ | Westmoreland | 3 hr |
| Jul 28, 2:29 PM EDT | Flash Flood Warning | PBZ | Indiana, Westmoreland | 4 hr |
| Jul 28, 4:09 PM EDT | Flash Flood Warning | PBZ | Washington | 7 hr |
| Jul 28, 5:14 PM EDT | Flash Flood Warning | CTP | Bedford, Fulton, Huntingdon | 3 hr |
| Jul 28, 5:46 PM EDT | Flash Flood Warning | PBZ | Fayette, Greene | 12 hr |
| Jul 28, 7:07 PM EDT | Flash Flood Warning | PBZ | Fayette | 5 hr |
| Jul 28, 8:45 PM EDT | Flash Flood Warning | PBZ | Allegheny, Armstrong, Westmoreland | 9 hr |
| Jul 28, 9:19 PM EDT | Flash Flood Warning | PBZ | Washington | 9 hr |
| Jul 28, 9:25 PM EDT | Flash Flood Warning | PHI | Berks | 4 hr |
| Jul 28, 9:35 PM EDT | Flash Flood Warning | PBZ | Allegheny | 8 hr |
| Jul 28, 9:39 PM EDT | Flash Flood Warning | PBZ | Allegheny, Armstrong, Beaver, Butler | 4 hr |
| Jul 28, 9:46 PM EDT | Flash Flood Warning | CTP | Blair, Cambria, Centre, Clearfield, Huntingdon | 3 hr |
| Jul 28, 10:08 PM EDT | Flash Flood Warning | PBZ | Washington | 9 hr |
| Jul 28, 10:09 PM EDT | Flash Flood Warning | CTP | Cumberland, Franklin, Fulton, Huntingdon, Juniata, Mifflin and 1 more | 3 hr |
| Jul 28, 10:35 PM EDT | Flash Flood Warning | PBZ | Greene | 5 hr |
| Jul 28, 10:53 PM EDT | Flash Flood Warning | PBZ | Allegheny, Armstrong, Butler | 5 hr |
| Jul 28, 10:59 PM EDT | Flash Flood Warning | PBZ | Allegheny, Beaver, Washington | 5 hr |
| Jul 28, 11:14 PM EDT | Flash Flood Warning | PBZ | Allegheny, Fayette, Washington, Westmoreland | 9 hr |
| Jul 28, 11:51 PM EDT | Flash Flood Warning | PBZ | Armstrong, Fayette, Indiana, Westmoreland | 8 hr |
| Aug 1, 6:17 PM EDT | Flash Flood Warning | PHI | Philadelphia | 4 hr |
| Aug 1, 6:44 PM EDT | Flash Flood Warning | PHI | Carbon | 4 hr |
| Aug 2, 12:52 PM EDT | Flash Flood Warning | BGM | Susquehanna | 3 hr |
| Aug 2, 1:48 PM EDT | Flash Flood Warning | PHI | Montgomery | 4 hr |
| Aug 2, 2:02 PM EDT | Flash Flood Warning | BGM | Wayne | 3 hr |
| Aug 2, 2:51 PM EDT | Flash Flood Warning | PBZ | Venango | 84 min |
| Aug 3, 5:17 PM EDT | Flash Flood Warning | PHI | Bucks | 4 hr |
| Aug 4, 12:48 PM EDT | Flash Flood Warning | CLE | Crawford, Erie | 6 hr |
| Aug 4, 10:12 PM EDT | Flash Flood Warning | CTP | Adams, Cumberland, Franklin | 3 hr |
| Aug 18, 4:02 PM EDT | Flash Flood Warning | PHI | Berks | 4 hr |
| Aug 23, 12:06 AM EDT | Flash Flood Warning | PHI | Chester, Delaware, Montgomery, Philadelphia | 4 hr |
| Sep 5, 5:14 PM EDT | Flash Flood Warning | PHI | Berks | 4 hr |
| Sep 5, 5:30 PM EDT | Flash Flood Warning | PHI | Berks | 4 hr |
| Nov 5, 6:22 PM EST | Flash Flood Warning | CLE | Erie | 5 hr |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Allegheny County17
- Westmoreland County13
- Fayette County12
- Washington County11
- Susquehanna County10
- Berks County10
- Armstrong County8
- Montgomery County8
- Bradford County8
- Indiana County7
- Philadelphia County7
- Butler County6
- Greene County6
- Lehigh County5
- Bucks County5
- Delaware County5
- Clarion County4
- Lackawanna County4
- Luzerne County4
- Beaver County4
- Cambria County4
- Erie County4
- Chester County4
- Venango County3
- Jefferson County3
- Clearfield County3
- Huntingdon County3
- Mercer County2
- Lawrence County2
- Wayne County2
- Crawford County2
- Forest County2
- Somerset County2
- Bedford County2
- Blair County2
- Centre County2
- Monroe County2
- Carbon County2
- Northampton County2
- York County2
19 more counties
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordThe radar archive20162018
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.