Alert archive / Delaware / Severe Thunderstorm Warnings
Severe Thunderstorm Warnings in Delaware, 2025
63 severe thunderstorm 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 severe thunderstorm warnings reaches back to 1986.
Severe Thunderstorm Warnings by county
Each county as a circle sized by its count in 2025. Tap one for its archive.
- Severe Thunderstorm Warnings
- 63
- Busiest month
- June21 severe thunderstorm warnings
- Busiest day
- June 19, 202511 severe thunderstorm 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 |
|---|---|---|---|---|
| Dec 31, 7:15 PM EST | Severe Thunderstorm Warning | PHI | Kent, New Castle, Sussex | 22 min |
| Mar 5, 4:43 PM EST | Severe Thunderstorm Warning | PHI | Kent, Sussex | 47 min |
| Mar 31, 8:56 PM EDT | Severe Thunderstorm Warning | PHI | Kent, New Castle, Sussex | 49 min |
| Mar 31, 9:13 PM EDT | Severe Thunderstorm Warning | PHI | Kent, Sussex | 47 min |
| Mar 31, 9:48 PM EDT | Severe Thunderstorm Warning | PHI | Kent, Sussex | 42 min |
| Mar 31, 10:22 PM EDT | Severe Thunderstorm Warning | PHI | Sussex | 38 min |
| Apr 4, 4:40 AM EDT | Severe Thunderstorm Warning | PHI | New Castle | 50 min |
| Apr 26, 3:48 PM EDT | Severe Thunderstorm Warning | PHI | Kent | 42 min |
| Apr 26, 7:55 PM EDT | Severe Thunderstorm Warning | PHI | Sussex | 34 min |
| May 3, 6:16 PM EDT | Severe Thunderstorm Warning | PHI | New Castle | 44 min |
| May 16, 11:16 AM EDT | Severe Thunderstorm Warning | PHI | New Castle | 59 min |
| May 16, 12:20 PM EDT | Severe Thunderstorm Warning | PHI | New Castle | 40 min |
| May 16, 2:18 PM EDT | Severe Thunderstorm Warning | PHI | Sussex | 42 min |
| May 16, 6:35 PM EDT | Severe Thunderstorm Warning | PHI | Kent, New Castle, Sussex | 70 min |
| May 30, 10:26 PM EDT | Severe Thunderstorm Warning | PHI | New Castle | 49 min |
| May 31, 1:17 PM EDT | Severe Thunderstorm Warning | PHI | Kent | 43 min |
| May 31, 1:30 PM EDT | Severe Thunderstorm Warning | PHI | Sussex | 45 min |
| May 31, 1:42 PM EDT | Severe Thunderstorm Warning | PHI | Kent, Sussex | 48 min |
| May 31, 2:00 PM EDT | Severe Thunderstorm Warning | PHI | Kent, Sussex | 45 min |
| May 31, 2:26 PM EDT | Severe Thunderstorm Warning | PHI | Sussex | 49 min |
| Jun 13, 2:00 PM EDT | Severe Thunderstorm Warning | PHI | Sussex | 45 min |
| Jun 18, 4:13 PM EDT | Severe Thunderstorm Warning | PHI | Kent, Sussex | 47 min |
| Jun 19, 4:34 PM EDT | Severe Thunderstorm Warning | PHI | New Castle | 41 min |
| Jun 19, 5:08 PM EDT | Severe Thunderstorm Warning | PHI | Kent, New Castle | 52 min |
| Jun 19, 5:13 PM EDT | Severe Thunderstorm Warning | PHI | New Castle | 47 min |
| Jun 19, 5:22 PM EDT | Severe Thunderstorm Warning | PHI | Kent, Sussex | 38 min |
| Jun 19, 5:23 PM EDT | Severe Thunderstorm Warning | PHI | New Castle | 52 min |
| Jun 19, 5:41 PM EDT | Severe Thunderstorm Warning | PHI | New Castle | 49 min |
| Jun 19, 5:55 PM EDT | Severe Thunderstorm Warning | PHI | Kent, New Castle | 39 min |
| Jun 19, 6:14 PM EDT | Severe Thunderstorm Warning | PHI | Kent, Sussex | 46 min |
| Jun 19, 6:55 PM EDT | Severe Thunderstorm Warning | PHI | Sussex | 50 min |
| Jun 19, 6:58 PM EDT | Severe Thunderstorm Warning | PHI | Sussex | 47 min |
| Jun 19, 7:48 PM EDT | Severe Thunderstorm Warning | PHI | Sussex | 27 min |
| Jun 26, 2:05 PM EDT | Severe Thunderstorm Warning | PHI | Sussex | 40 min |
| Jun 26, 7:14 PM EDT | Severe Thunderstorm Warning | PHI | New Castle | 46 min |
| Jun 29, 2:21 AM EDT | Severe Thunderstorm Warning | PHI | Kent | 26 min |
| Jun 29, 6:21 PM EDT | Severe Thunderstorm Warning | PHI | Sussex | 39 min |
| Jun 29, 6:52 PM EDT | Severe Thunderstorm Warning | PHI | Sussex | 38 min |
| Jun 30, 1:16 PM EDT | Severe Thunderstorm Warning | PHI | Sussex | 44 min |
| Jun 30, 1:28 PM EDT | Severe Thunderstorm Warning | PHI | New Castle | 47 min |
| Jun 30, 3:52 PM EDT | Severe Thunderstorm Warning | PHI | New Castle | 38 min |
| Jun 30, 9:41 PM EDT | Severe Thunderstorm Warning | PHI | New Castle | 64 min |
| Jul 1, 2:32 PM EDT | Severe Thunderstorm Warning | PHI | New Castle | 43 min |
| Jul 1, 4:50 PM EDT | Severe Thunderstorm Warning | PHI | Kent, New Castle | 55 min |
| Jul 1, 5:04 PM EDT | Severe Thunderstorm Warning | PHI | Kent, Sussex | 56 min |
| Jul 1, 5:42 PM EDT | Severe Thunderstorm Warning | PHI | Kent, Sussex | 48 min |
| Jul 1, 8:15 PM EDT | Severe Thunderstorm Warning | PHI | Sussex | 60 min |
| Jul 8, 5:45 PM EDT | Severe Thunderstorm Warning | PHI | Kent, New Castle | 60 min |
| Jul 8, 6:54 PM EDT | Severe Thunderstorm Warning | PHI | Kent, Sussex | 66 min |
| Jul 8, 7:28 PM EDT | Severe Thunderstorm Warning | PHI | Sussex | 47 min |
| Jul 9, 7:24 PM EDT | Severe Thunderstorm Warning | PHI | New Castle | 51 min |
| Jul 9, 8:51 PM EDT | Severe Thunderstorm Warning | PHI | Sussex | 39 min |
| Jul 14, 3:14 PM EDT | Severe Thunderstorm Warning | PHI | New Castle | 31 min |
| Jul 16, 10:44 PM EDT | Severe Thunderstorm Warning | PHI | New Castle | 46 min |
| Jul 19, 9:58 PM EDT | Severe Thunderstorm Warning | PHI | Sussex | 47 min |
| Jul 25, 9:06 PM EDT | Severe Thunderstorm Warning | PHI | Kent, Sussex | 54 min |
| Jul 25, 9:09 PM EDT | Severe Thunderstorm Warning | PHI | Kent, New Castle | 44 min |
| Jul 31, 2:05 PM EDT | Severe Thunderstorm Warning | PHI | New Castle | 40 min |
| Jul 31, 2:55 PM EDT | Severe Thunderstorm Warning | PHI | New Castle | 50 min |
| Jul 31, 4:32 PM EDT | Severe Thunderstorm Warning | PHI | Kent, Sussex | 21 min |
| Aug 13, 6:26 PM EDT | Severe Thunderstorm Warning | PHI | New Castle | 49 min |
| Sep 6, 6:00 PM EDT | Severe Thunderstorm Warning | PHI | Kent, New Castle | 32 min |
| Dec 19, 1:40 PM EST | Severe Thunderstorm Warning | PHI | New Castle | 65 min |
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.
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.