Flash Flood Warnings in Delaware
413 flash flood warnings since 1986. 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 since 1986. Tap one for its archive.
- Flash Flood Warnings
- 413
- Busiest year
- 201828 flash flood warnings
- Average year
- 10over 40 years on file
Over time
By year
Before October 2007 these were issued for whole counties, and a storm crossing three counties was often three warnings; since then one polygon follows the storm. The count changed with the practice, not only with the weather.
By month of the year
By county
Every county with at least one alert. A county page lists each alert that covered it.
The latest flash flood warnings
The most recent on file, newest first.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 3, 1:34 AM EDT | Flash Flood Warning | PHI | New Castle | 4 hr |
| Sep 1, 8:44 PM EDT | Flash Flood Warning | PHI | New Castle | 3 hr |
| Aug 28, 1:11 PM EDT | Flash Flood Warning | PHI | Sussex | 4 hr |
| Aug 27, 1:50 PM EDT | Flash Flood Warning | PHI | New Castle | 4 hr |
| Aug 27, 11:38 AM EDT | Flash Flood Warning | PHI | New Castle | 4 hr |
| Aug 23, 3:32 AM EDT | Flash Flood Warning | PHI | New Castle | 3 hr |
| Aug 20, 6:53 PM EDT | Flash Flood Warning | PHI | Kent | 105 min |
| Aug 20, 5:39 PM EDT | Flash Flood Warning | PHI | New Castle | 4 hr |
| Aug 17, 4:43 AM EDT | Flash Flood Warning | PHI | New Castle | 2 hr |
| Aug 3, 9:08 AM EDT | Flash Flood Warning | PHI | New Castle | 3 hr |
| Jul 28, 7:11 PM EDT | Flash Flood Warning | PHI | New Castle | 3 hr |
| Jul 27, 5:22 PM EDT | Flash Flood Warning | PHI | Sussex | 2 hr |
Nearby
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.