Alert archive / Pennsylvania / Flash Flood Warnings / 1999
Flash Flood Warnings in Pennsylvania, September 1999
44 flash flood warnings in September 1999. 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 1999. Tap one for its archive.
- Flash Flood Warnings
- 44
- Busiest day
- September 16, 199921 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 5, 11:34 PM EDT | Flash Flood Warning | PHI | Chester | 14 hr |
| Sep 6, 3:01 PM EDT | Flash Flood Warning | CTP | Franklin, Fulton | 3 hr |
| Sep 6, 3:01 PM EDT | Flash Flood Warning | CTP | Bedford, Cambria, Somerset | 3 hr |
| Sep 6, 4:17 PM EDT | Flash Flood Warning | CTP | Lancaster, York | 3 hr |
| Sep 6, 9:07 PM EDT | Flash Flood Warning | CTP | Cumberland, Dauphin, Perry, York | 3 hr |
| Sep 6, 11:37 PM EDT | Flash Flood Warning | CTP | Lycoming, Snyder, Union | 3 hr |
| Sep 6, 11:47 PM EDT | Flash Flood Warning | CTP | Cumberland, Dauphin, York | 3 hr |
| Sep 6, 11:47 PM EDT | Flash Flood Warning | CTP | Perry | 3 hr |
| Sep 7, 2:06 AM EDT | Flash Flood Warning | CTP | Northumberland | 3 hr |
| Sep 7, 2:25 AM EDT | Flash Flood Warning | CTP | Perry, Snyder, Union | 4 hr |
| Sep 7, 2:25 AM EDT | Flash Flood Warning | CTP | Dauphin, York | 4 hr |
| Sep 7, 2:25 AM EDT | Flash Flood Warning | CTP | Lycoming | 4 hr |
| Sep 7, 3:45 AM EDT | Flash Flood Warning | CTP | Tioga | 2 hr |
| Sep 7, 4:10 AM EDT | Flash Flood Warning | PHI | Berks | 3 hr |
| Sep 9, 5:54 PM EDT | Flash Flood Warning | CTP | Lancaster | 3 hr |
| Sep 9, 6:10 PM EDT | Flash Flood Warning | CTP | York | 3 hr |
| Sep 9, 7:17 PM EDT | Flash Flood Warning | PHI | Monroe, Northampton | 3 hr |
| Sep 9, 7:17 PM EDT | Flash Flood Warning | PHI | Berks | 3 hr |
| Sep 9, 8:58 PM EDT | Flash Flood Warning | CTP | Lancaster, York | 3 hr |
| Sep 9, 10:45 PM EDT | Flash Flood Warning | CTP | Union | 3 hr |
| Sep 16, 8:37 AM EDT | Flash Flood Warning | PHI | Chester, Delaware, Philadelphia | 4 hr |
| Sep 16, 9:00 AM EDT | Flash Flood Warning | CTP | Dauphin, Lebanon, Schuylkill | 6 hr |
| Sep 16, 9:00 AM EDT | Flash Flood Warning | CTP | Lancaster, York | 6 hr |
| Sep 16, 9:00 AM EDT | Flash Flood Warning | CTP | Adams, Cumberland, Perry | 6 hr |
| Sep 16, 9:25 AM EDT | Flash Flood Warning | PHI | Bucks, Montgomery | 6 hr |
| Sep 16, 11:25 AM EDT | Flash Flood Warning | PHI | Delaware, Philadelphia | 6 hr |
| Sep 16, 11:25 AM EDT | Flash Flood Warning | PHI | Chester | 6 hr |
| Sep 16, 12:11 PM EDT | Flash Flood Warning | PHI | Berks, Lehigh | 5 hr |
| Sep 16, 12:11 PM EDT | Flash Flood Warning | PHI | Northampton | 5 hr |
| Sep 16, 2:15 PM EDT | Flash Flood Warning | CTP | Adams, Cumberland, Dauphin, Lancaster, York | 7 hr |
| Sep 16, 2:15 PM EDT | Flash Flood Warning | CTP | Perry | 7 hr |
| Sep 16, 2:15 PM EDT | Flash Flood Warning | CTP | Lebanon, Schuylkill | 7 hr |
| Sep 16, 2:41 PM EDT | Flash Flood Warning | PHI | Bucks, Chester, Delaware, Montgomery, Philadelphia | 6 hr |
| Sep 16, 3:21 PM EDT | Flash Flood Warning | PHI | Carbon, Monroe | 6 hr |
| Sep 16, 4:21 PM EDT | Flash Flood Warning | PHI | Northampton | 5 hr |
| Sep 16, 4:21 PM EDT | Flash Flood Warning | PHI | Berks, Lehigh | 5 hr |
| Sep 16, 4:35 PM EDT | Flash Flood Warning | CTP | Columbia, Lycoming, Montour, Northumberland, Union | 3 hr |
| Sep 16, 4:35 PM EDT | Flash Flood Warning | CTP | Snyder | 3 hr |
| Sep 16, 5:15 PM EDT | Flash Flood Warning | BGM | Lackawanna, Luzerne | 5 hr |
| Sep 16, 5:15 PM EDT | Flash Flood Warning | BGM | Pike, Wayne | 5 hr |
| Sep 16, 7:30 PM EDT | Flash Flood Warning | CTP | Snyder, Union | 90 min |
| Sep 16, 9:59 PM EDT | Flash Flood Warning | BGM | Pike | 6 hr |
| Sep 16, 9:59 PM EDT | Flash Flood Warning | BGM | Lackawanna, Luzerne, Wayne | 6 hr |
| Sep 30, 1:25 AM EDT | Flash Flood Warning | CTP | Snyder, Union | 3 hr |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- York County8
- Union County6
- Lancaster County5
- Dauphin County5
- Perry County5
- Snyder County5
- Chester County4
- Cumberland County4
- Berks County4
- Lycoming County3
- Northampton County3
- Delaware County3
- Philadelphia County3
- Northumberland County2
- Monroe County2
- Lebanon County2
- Schuylkill County2
- Adams County2
- Bucks County2
- Montgomery County2
- Lehigh County2
- Lackawanna County2
- Luzerne County2
- Pike County2
- Wayne County2
- Franklin County1
- Fulton County1
- Bedford County1
- Cambria County1
- Somerset County1
- Tioga County1
- Carbon County1
- Columbia County1
- Montour County1
Nearby
Alerts in force nowTornadoes on recordThe radar archive19982000
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.