Alert archive / Pennsylvania / Flash Flood Warnings / 2021
Flash Flood Warnings in Pennsylvania, September 2021
36 flash flood warnings in September 2021. 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 September 2021. Tap one for its archive.
- Flash Flood Warnings
- 36
- Busiest day
- September 1, 202124 flash flood 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 |
|---|---|---|---|---|
| Sep 1, 6:23 AM EDT | Flash Flood Warning | PBZ | Allegheny, Armstrong, Beaver, Butler, Indiana, Washington and 1 more | 5 hr |
| Sep 1, 6:49 AM EDT | Flash Flood Warning | PHI | Chester, Delaware, Philadelphia | 86 min |
| Sep 1, 7:16 AM EDT | Flash Flood Warning | PBZ | Armstrong, Indiana, Westmoreland | 6 hr |
| Sep 1, 7:21 AM EDT | Flash Flood Warning | PBZ | Fayette, Greene | 6 hr |
| Sep 1, 7:50 AM EDT | Flash Flood Warning | PBZ | Washington | 3 hr |
| Sep 1, 8:54 AM EDT | Flash Flood Warning | CTP | Bedford, Blair, Cambria, Centre, Clearfield, Fulton and 3 more | 8 hr |
| Sep 1, 9:27 AM EDT | Flash Flood Warning | PBZ | Allegheny, Armstrong, Fayette, Greene, Indiana, Washington and 1 more | 4 hr |
| Sep 1, 9:37 AM EDT | Flash Flood Warning | CTP | Cambria, Clearfield, Somerset | 6 hr |
| Sep 1, 11:02 AM EDT | Flash Flood Warning | BGM | Lackawanna, Luzerne | 13 hr |
| Sep 1, 12:04 PM EDT | Flash Flood Warning | CTP | Adams, Columbia, Cumberland, Dauphin, Franklin, Juniata and 10 more | 6 hr |
| Sep 1, 12:07 PM EDT | Flash Flood Warning | PHI | Carbon, Monroe | 4 hr |
| Sep 1, 1:00 PM EDT | Flash Flood Warning | BGM | Lackawanna, Luzerne, Pike, Wayne, Wyoming | 11 hr |
| Sep 1, 1:09 PM EDT | Flash Flood Warning | CTP | Cambria | 5 hr |
| Sep 1, 1:29 PM EDT | Flash Flood Warning | PHI | Berks, Lehigh | 6 hr |
| Sep 1, 2:53 PM EDT | Flash Flood Warning | PHI | Berks, Chester, Delaware, Montgomery | 9 hr |
| Sep 1, 4:00 PM EDT | Flash Flood Warning | BGM | Pike, Wayne | 10 hr |
| Sep 1, 4:12 PM EDT | Flash Flood Warning | PHI | Berks, Bucks, Lehigh, Montgomery, Northampton | 7 hr |
| Sep 1, 4:24 PM EDT | Flash Flood Warning | CTP | Adams, York | 4 hr |
| Sep 1, 4:42 PM EDT | Flash Flood Warning | PHI | Chester, Delaware, Montgomery | 6 hr |
| Sep 1, 5:26 PM EDT | Flash Flood Warning | PHI | Bucks, Delaware, Montgomery, Philadelphia | 9 hr |
| Sep 1, 5:42 PM EDT | Flash Flood Warning | PHI | Bucks | 10 hr |
| Sep 1, 6:08 PM EDT | Flash Flood Warning | PHI | Monroe, Northampton | 6 hr |
| Sep 1, 7:05 PM EDT | Flash Flood Warning | PHI | Bucks | 8 hr |
| Sep 1, 7:31 PM EDT | Flash Flood Warning | PHI | Bucks | 4 hr |
| Sep 1, 10:24 PM EDT | Flash Flood Warning | PHI | Bucks, Philadelphia | 4 hr |
| Sep 1, 11:46 PM EDT | Flash Flood Warning | BGM | Lackawanna, Pike, Wayne | 74 min |
| Sep 8, 9:48 PM EDT | Flash Flood Warning | PHI | Lehigh, Northampton | 7 hr |
| Sep 8, 10:10 PM EDT | Flash Flood Warning | CTP | Adams, York | 95 min |
| Sep 8, 10:42 PM EDT | Flash Flood Warning | PHI | Northampton | 6 hr |
| Sep 13, 9:12 PM EDT | Flash Flood Warning | PHI | Northampton | 114 min |
| Sep 15, 2:36 PM EDT | Flash Flood Warning | CTP | Lycoming, Sullivan | 66 min |
| Sep 15, 4:12 PM EDT | Flash Flood Warning | CTP | Columbia, Lycoming, Sullivan | 3 hr |
| Sep 23, 11:57 AM EDT | Flash Flood Warning | PHI | Chester, Delaware | 3 hr |
| Sep 23, 12:28 PM EDT | Flash Flood Warning | PHI | Chester, Delaware, Montgomery, Philadelphia | 4 hr |
| Sep 23, 1:42 PM EDT | Flash Flood Warning | PHI | Bucks, Delaware, Montgomery, Philadelphia | 4 hr |
| Sep 23, 3:26 PM EDT | Flash Flood Warning | PHI | Bucks | 2 hr |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Bucks County8
- Delaware County7
- Montgomery County6
- Chester County5
- Philadelphia County5
- Northampton County5
- Armstrong County3
- Indiana County3
- Washington County3
- Westmoreland County3
- Cambria County3
- Lackawanna County3
- Adams County3
- York County3
- Pike County3
- Wayne County3
- Berks County3
- Lehigh County3
- Allegheny County2
- Fayette County2
- Greene County2
- Clearfield County2
- Mifflin County2
- Somerset County2
- Luzerne County2
- Columbia County2
- Monroe County2
- Lycoming County2
- Sullivan County2
- Beaver County1
- Butler County1
- Bedford County1
- Blair County1
- Centre County1
- Fulton County1
- Huntingdon County1
- Cumberland County1
- Dauphin County1
- Franklin County1
- Juniata County1
Nearby
Alerts in force nowTornadoes on recordThe radar archive20202022
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.