Alert archive / Pennsylvania / Flash Flood Warnings
Flash Flood Warnings in Pennsylvania, 2020
71 flash flood warnings in 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 flash flood warnings reaches back to 1986.
Flash Flood Warnings by county
Each county as a circle sized by its count in 2020. Tap one for its archive.
- Flash Flood Warnings
- 71
- Busiest month
- August29 flash flood warnings
- Busiest day
- August 4, 202010 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 |
|---|---|---|---|---|
| Mar 28, 4:10 PM EDT | Flash Flood Warning | PBZ | Allegheny, Beaver, Fayette, Washington, Westmoreland | 9 hr |
| Mar 28, 4:19 PM EDT | Flash Flood Warning | PBZ | Allegheny, Armstrong, Beaver, Butler, Lawrence, Westmoreland | 3 hr |
| Mar 28, 4:35 PM EDT | Flash Flood Warning | PBZ | Armstrong, Indiana, Jefferson, Westmoreland | 5 hr |
| Mar 28, 5:23 PM EDT | Flash Flood Warning | PBZ | Fayette, Greene, Washington | 3 hr |
| Mar 28, 9:24 PM EDT | Flash Flood Warning | PBZ | Washington | 3 hr |
| Apr 13, 1:07 PM EDT | Flash Flood Warning | PHI | Berks, Carbon, Lehigh, Northampton | 4 hr |
| Apr 13, 1:47 PM EDT | Flash Flood Warning | PHI | Chester | 3 hr |
| May 29, 3:50 PM EDT | Flash Flood Warning | BGM | Bradford | 3 hr |
| May 29, 5:05 PM EDT | Flash Flood Warning | BGM | Bradford | 2 hr |
| Jun 4, 6:16 PM EDT | Flash Flood Warning | CTP | Lebanon, Schuylkill | 3 hr |
| Jun 11, 6:20 AM EDT | Flash Flood Warning | BGM | Pike, Wayne | 3 hr |
| Jun 23, 9:26 PM EDT | Flash Flood Warning | CTP | Dauphin, Lebanon, Schuylkill | 3 hr |
| Jun 27, 3:38 PM EDT | Flash Flood Warning | PBZ | Armstrong, Indiana | 105 min |
| Jun 27, 4:27 PM EDT | Flash Flood Warning | PBZ | Armstrong, Butler, Lawrence | 57 min |
| Jul 6, 1:08 PM EDT | Flash Flood Warning | PHI | Bucks, Delaware, Montgomery, Philadelphia | 4 hr |
| Jul 6, 1:54 PM EDT | Flash Flood Warning | BGM | Wyoming | 2 hr |
| Jul 6, 2:57 PM EDT | Flash Flood Warning | PHI | Bucks, Delaware, Montgomery, Philadelphia | 4 hr |
| Jul 6, 4:07 PM EDT | Flash Flood Warning | PHI | Chester, Delaware, Montgomery | 4 hr |
| Jul 6, 6:54 PM EDT | Flash Flood Warning | PHI | Berks, Chester, Montgomery | 109 min |
| Jul 7, 5:48 PM EDT | Flash Flood Warning | PBZ | Allegheny, Beaver, Washington | 3 hr |
| Jul 8, 3:57 PM EDT | Flash Flood Warning | PHI | Berks | 3 hr |
| Jul 8, 5:23 PM EDT | Flash Flood Warning | CTP | Somerset | 3 hr |
| Jul 8, 5:52 PM EDT | Flash Flood Warning | CTP | York | 3 hr |
| Jul 9, 5:32 PM EDT | Flash Flood Warning | PBZ | Allegheny | 72 min |
| Jul 10, 12:56 PM EDT | Flash Flood Warning | PHI | Chester, Delaware, Montgomery, Philadelphia | 4 hr |
| Jul 10, 5:42 PM EDT | Flash Flood Warning | PBZ | Fayette | 2 hr |
| Jul 12, 5:46 PM EDT | Flash Flood Warning | PBZ | Armstrong, Indiana | 3 hr |
| Jul 12, 6:33 PM EDT | Flash Flood Warning | CTP | Tioga | 2 hr |
| Jul 12, 6:54 PM EDT | Flash Flood Warning | PHI | Berks, Lehigh | 3 hr |
| Jul 23, 8:05 PM EDT | Flash Flood Warning | CTP | Cambria | 2 hr |
| Jul 23, 8:22 PM EDT | Flash Flood Warning | PBZ | Westmoreland | 113 min |
| Jul 24, 12:24 AM EDT | Flash Flood Warning | PHI | Chester | 114 min |
| Jul 24, 10:43 AM EDT | Flash Flood Warning | PHI | Philadelphia | 76 min |
| Jul 24, 2:26 PM EDT | Flash Flood Warning | PHI | Bucks, Montgomery, Philadelphia | 2 hr |
| Aug 2, 4:42 AM EDT | Flash Flood Warning | PHI | Berks | 4 hr |
| Aug 4, 7:28 AM EDT | Flash Flood Warning | PHI | Chester, Delaware, Montgomery | 3 hr |
| Aug 4, 8:11 AM EDT | Flash Flood Warning | PHI | Bucks, Lehigh, Montgomery, Northampton | 4 hr |
| Aug 4, 9:38 AM EDT | Flash Flood Warning | PHI | Monroe, Northampton | 4 hr |
| Aug 4, 10:02 AM EDT | Flash Flood Warning | PHI | Chester, Delaware | 4 hr |
| Aug 4, 10:20 AM EDT | Flash Flood Warning | PHI | Bucks, Chester, Delaware, Montgomery, Philadelphia | 4 hr |
| Aug 4, 10:30 AM EDT | Flash Flood Warning | CTP | Lancaster, York | 4 hr |
| Aug 4, 11:01 AM EDT | Flash Flood Warning | PHI | Bucks | 4 hr |
| Aug 4, 11:43 AM EDT | Flash Flood Warning | PHI | Berks, Lehigh, Northampton | 4 hr |
| Aug 4, 1:22 PM EDT | Flash Flood Warning | BGM | Lackawanna, Pike, Wayne | 4 hr |
| Aug 4, 2:16 PM EDT | Flash Flood Warning | BGM | Pike | 4 hr |
| Aug 7, 5:08 AM EDT | Flash Flood Warning | BGM | Bradford, Susquehanna | 3 hr |
| Aug 7, 3:31 PM EDT | Flash Flood Warning | CTP | Lancaster, York | 3 hr |
| Aug 7, 4:10 PM EDT | Flash Flood Warning | PHI | Berks | 2 hr |
| Aug 7, 4:32 PM EDT | Flash Flood Warning | PHI | Chester | 3 hr |
| Aug 7, 4:40 PM EDT | Flash Flood Warning | CTP | Lancaster, York | 118 min |
| Aug 7, 5:03 PM EDT | Flash Flood Warning | PHI | Chester, Delaware | 5 hr |
| Aug 7, 5:43 PM EDT | Flash Flood Warning | PHI | Montgomery, Philadelphia | 4 hr |
| Aug 12, 1:47 PM EDT | Flash Flood Warning | PHI | Chester, Delaware | 2 hr |
| Aug 12, 2:40 PM EDT | Flash Flood Warning | PHI | Chester, Delaware, Montgomery, Philadelphia | 3 hr |
| Aug 12, 3:36 PM EDT | Flash Flood Warning | PHI | Chester | 108 min |
| Aug 12, 4:15 PM EDT | Flash Flood Warning | CTP | Lancaster, York | 2 hr |
| Aug 13, 8:37 AM EDT | Flash Flood Warning | PHI | Bucks | 3 hr |
| Aug 13, 9:07 AM EDT | Flash Flood Warning | PHI | Bucks, Montgomery | 3 hr |
| Aug 22, 8:25 PM EDT | Flash Flood Warning | PBZ | Allegheny | 68 min |
| Aug 24, 3:36 PM EDT | Flash Flood Warning | BGM | Luzerne | 2 hr |
| Aug 28, 12:38 PM EDT | Flash Flood Warning | PBZ | Allegheny, Westmoreland | 6 hr |
| Aug 28, 1:14 PM EDT | Flash Flood Warning | PBZ | Allegheny, Indiana, Westmoreland | 6 hr |
| Aug 28, 2:10 PM EDT | Flash Flood Warning | PBZ | Westmoreland | 3 hr |
| Dec 24, 5:54 PM EST | Flash Flood Warning | BGM | Bradford | 8 hr |
| Dec 24, 6:46 PM EST | Flash Flood Warning | BGM | Bradford | 8 hr |
| Dec 24, 7:05 PM EST | Flash Flood Warning | BGM | Luzerne, Wyoming | 8 hr |
| Dec 24, 10:13 PM EST | Flash Flood Warning | BGM | Luzerne | 6 hr |
| Dec 24, 10:25 PM EST | Flash Flood Warning | BGM | Susquehanna | 6 hr |
| Dec 24, 11:52 PM EST | Flash Flood Warning | BGM | Susquehanna, Wayne | 6 hr |
| Dec 25, 2:05 AM EST | Flash Flood Warning | BGM | Luzerne, Wyoming | 4 hr |
| Dec 25, 2:13 AM EST | Flash Flood Warning | BGM | Bradford, Susquehanna | 4 hr |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Chester County13
- Montgomery County12
- Delaware County10
- Bucks County8
- Philadelphia County8
- Allegheny County7
- Westmoreland County7
- Berks County7
- Bradford County6
- Armstrong County5
- York County5
- Washington County4
- Indiana County4
- Lehigh County4
- Northampton County4
- Lancaster County4
- Susquehanna County4
- Luzerne County4
- Beaver County3
- Fayette County3
- Pike County3
- Wayne County3
- Wyoming County3
- Butler County2
- Lawrence County2
- Lebanon County2
- Schuylkill County2
- Jefferson County1
- Greene County1
- Carbon County1
- Dauphin County1
- Somerset County1
- Tioga County1
- Cambria County1
- Monroe County1
- Lackawanna County1
The busiest days
Days with the most alerts issued, by UTC date.
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. Rebuilt daily.