Alert archive / Delaware / Dense Fog Advisories
Dense Fog Advisories in Delaware, 2026
10 dense fog advisories in 2026. 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 dense fog advisories reaches back to 2005.
Dense Fog Advisories by county
Each county as a circle sized by its count in 2026. Tap one for its archive.
- Dense Fog Advisories
- 10
- Busiest month
- March7 dense fog advisories
- Busiest day
- March 9, 20262 dense fog advisories
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 |
|---|---|---|---|---|
| Jan 7, 12:12 AM EST | Dense Fog Advisory | PHI | Kent, New Castle | 8 hr |
| Feb 17, 1:15 PM EST | Dense Fog Advisory | PHI | Kent, New Castle, Sussex | 21 hr |
| Mar 3, 4:04 PM EST | Dense Fog Advisory | PHI | Kent, New Castle, Sussex | 6 hr |
| Mar 4, 1:08 PM EST | Dense Fog Advisory | PHI | Sussex | 16 hr |
| Mar 6, 1:00 PM EST | Dense Fog Advisory | PHI | Sussex | 23 hr |
| Mar 8, 1:22 AM EST | Dense Fog Advisory | PHI | New Castle | 9 hr |
| Mar 9, 1:03 AM EDT | Dense Fog Advisory | PHI | Kent, Sussex | 5 hr |
| Mar 9, 7:33 PM EDT | Dense Fog Advisory | PHI | Kent, New Castle, Sussex | 10 hr |
| Mar 21, 3:25 AM EDT | Dense Fog Advisory | PHI | New Castle | 5 hr |
| Apr 3, 5:34 AM EDT | Dense Fog Advisory | PHI | Kent, New Castle, Sussex | 5 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.
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. Warning verification from the Mesonet's Cow. Rebuilt daily.