Alert archive / Delaware / 2026
Weather alerts in Delaware, September 2026
29 weather alerts in September 2026, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered any part of the state, so the counties below add up to more than the state.
Weather alerts by county
Each county as a circle sized by its count in September 2026. Tap one for its archive.
- Alerts
- 29
- Warnings
- 14
- Watches
- 4
- Advisories
- 6
- Busiest day
- September 2, 20269 alerts
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, 2:30 AM EDT | Heat Advisory | PHI | New Castle | 18 hr |
| Sep 1, 3:13 PM EDT | Mesoscale Discussion | SPC | Kent, New Castle | 2 hr |
| Sep 1, 4:32 PM EDT | Severe Thunderstorm Watch | SPC | Kent, New Castle, Sussex | 7 hr |
| Sep 1, 6:32 PM EDT | Mesoscale Discussion | SPC | New Castle | 88 min |
| Sep 1, 7:43 PM EDT | Severe Thunderstorm Warning | PHI | New Castle | 47 min |
| Sep 1, 8:17 PM EDT | Severe Thunderstorm Warning | PHI | New Castle | 58 min |
| Sep 1, 8:44 PM EDT | Flash Flood Warning | PHI | New Castle | 3 hr |
| Sep 1, 8:46 PM EDT | Severe Thunderstorm Warning | PHI | Kent, New Castle | 59 min |
| Sep 1, 9:40 PM EDT | Severe Thunderstorm Warning | PHI | Kent, New Castle, Sussex | 65 min |
| Sep 1, 9:46 PM EDT | Mesoscale Discussion | SPC | Kent, New Castle, Sussex | 119 min |
| Sep 2, 3:53 AM EDT | Heat Advisory | PHI | Kent, New Castle, Sussex | 40 hr |
| Sep 2, 1:35 PM EDT | Severe Thunderstorm Warning | PHI | Kent, New Castle | 40 min |
| Sep 2, 2:05 PM EDT | Severe Thunderstorm Warning | PHI | Kent, Sussex | 40 min |
| Sep 2, 2:38 PM EDT | Severe Thunderstorm Warning | PHI | Kent, Sussex | 47 min |
| Sep 3, 12:02 AM EDT | Severe Thunderstorm Warning | PHI | Kent | 43 min |
| Sep 3, 1:34 AM EDT | Flash Flood Warning | PHI | New Castle | 4 hr |
| Sep 3, 5:26 AM EDT | Areal Flood Warning | PHI | New Castle | 4 hr |
| Sep 3, 8:38 PM EDT | Severe Thunderstorm Watch | SPC | Kent, New Castle, Sussex | 5 hr |
| Sep 3, 11:13 PM EDT | Mesoscale Discussion | SPC | Kent, Sussex | 92 min |
| Sep 4, 12:52 AM EDT | Severe Thunderstorm Warning | PHI | Kent, Sussex | 53 min |
| Sep 4, 1:35 AM EDT | Severe Thunderstorm Warning | PHI | Sussex | 25 min |
| Sep 5, 4:13 PM EDT | Coastal Flood Advisory | PHI | Kent, Sussex | 29 hr |
| Sep 12, 2:21 AM EDT | Flood Watch | PHI | New Castle | 34 hr |
| Sep 21, 4:10 AM EDT | Rip Current Statement | PHI | Sussex | 5 days |
| Sep 21, 1:24 PM EDT | Coastal Flood Watch | PHI | Kent, Sussex | 27 hr |
| Sep 21, 1:24 PM EDT | Coastal Flood Advisory | PHI | Kent, New Castle, Sussex | 3 days |
| Sep 21, 3:27 PM EDT | High Surf Advisory | PHI | Sussex | 4 days |
| Sep 22, 2:51 AM EDT | Wind Advisory | PHI | Sussex | 45 hr |
| Sep 22, 4:14 PM EDT | Coastal Flood Warning | PHI | Kent, Sussex | 57 hr |
By product
Every kind of product issued here, grouped by hazard. Each opens the same place narrowed to that product.
| Product | Alerts |
|---|---|
| Severe storms | |
| Severe Thunderstorm Warning | 10 |
| Severe Thunderstorm Watch | 2 |
| Mesoscale Discussion | 4 |
| Flooding | |
| Areal Flood Warning | 1 |
| Flash Flood Warning | 2 |
| Flood Watch | 1 |
| Heat | |
| Heat Advisory | 2 |
| Wind and dust | |
| Wind Advisory | 1 |
| Coast and beach | |
| Coastal Flood Warning | 1 |
| Coastal Flood Watch | 1 |
| Coastal Flood Advisory | 2 |
| High Surf Advisory | 1 |
| Rip Current Statement | 1 |
By county
Every county with at least one alert. A county page lists each alert that covered it.
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.