Alert archive / Delaware / Flash Flood Warnings

Flash Flood Warnings in Delaware, 2025

23 flash flood warnings in 2025. 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 2025. Tap one for its archive.

Flash Flood Warnings
23
Busiest month
July15 flash flood warnings
Busiest day
July 10, 20254 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.

IssuedProductOfficeCountiesLasted
May 3, 7:32 PM EDTFlash Flood WarningPHINew Castle3 hr
May 16, 11:32 AM EDTFlash Flood WarningPHINew Castle4 hr
May 30, 10:26 PM EDTFlash Flood WarningPHINew Castle4 hr
Jun 26, 7:27 PM EDTFlash Flood WarningPHINew Castle4 hr
Jun 29, 4:12 PM EDTFlash Flood WarningPHISussex4 hr
Jun 30, 1:34 PM EDTFlash Flood WarningPHISussex3 hr
Jun 30, 1:55 PM EDTFlash Flood WarningPHINew Castle4 hr
Jul 8, 5:31 PM EDTFlash Flood WarningPHINew Castle4 hr
Jul 8, 5:45 PM EDTFlash Flood WarningPHINew Castle4 hr
Jul 9, 7:18 PM EDTFlash Flood WarningPHINew Castle4 hr
Jul 9, 7:38 PM EDTFlash Flood WarningPHINew Castle4 hr
Jul 9, 8:00 PM EDTFlash Flood Warning Considerable damage threatPHINew Castle4 hr
Jul 9, 8:32 PM EDTFlash Flood Warning Considerable damage threatPHINew Castle4 hr
Jul 10, 4:15 PM EDTFlash Flood WarningPHIKent117 min
Jul 10, 7:33 PM EDTFlash Flood WarningPHISussex104 min
Jul 14, 3:33 PM EDTFlash Flood WarningPHINew Castle4 hr
Jul 14, 4:34 PM EDTFlash Flood WarningPHINew Castle4 hr
Jul 15, 6:34 PM EDTFlash Flood WarningPHIKent, Sussex2 hr
Jul 16, 10:43 PM EDTFlash Flood WarningPHINew Castle2 hr
Jul 19, 10:25 PM EDTFlash Flood WarningPHISussex3 hr
Jul 31, 2:09 PM EDTFlash Flood Warning Considerable damage threatPHINew Castle4 hr
Jul 31, 2:46 PM EDTFlash Flood Warning Considerable damage threatPHINew Castle4 hr
Aug 13, 6:59 PM EDTFlash Flood WarningPHINew Castle2 hr

By county

Every county with at least one alert. A county page lists each alert that covered it.

The busiest days

Days with the most alerts issued, by UTC date.

  1. July 10, 20254flash flood warnings
  2. June 30, 20252flash flood warnings
  3. July 8, 20252flash flood warnings
  4. July 9, 20252flash flood warnings
  5. July 14, 20252flash flood warnings
  6. July 31, 20252flash flood warnings
  7. May 3, 20251flash flood warnings
  8. May 16, 20251flash flood warnings
  9. May 31, 20251flash flood warnings
  10. June 26, 20251flash flood warnings
  11. June 29, 20251flash flood warnings
  12. July 15, 20251flash flood warnings

Nearby

Alerts in force nowTornadoes on recordThe radar archive20242026

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.