Alert archive / Pennsylvania / Dense Fog Advisories in 2025
Dense Fog Advisory 9, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this dense fog advisory at Sep 26, 2025, 3:37 AM EDT for Mercer County, New Jersey; 6 counties in Pennsylvania. It was in force for 5 hr.
The area
The counties it named.
The facts
- Issued
- Sep 26, 2025, 3:37 AM EDT (07:37 UTC)
- Expired
- Sep 26, 2025, 9:00 AM EDT
- In force
- 5 hr
- Issued by
- NWS Philadelphia/Mount Holly
Counties Mercer County, NJ, Berks County, PA, Bucks County, PA, Chester County, PA, Lehigh County, PA, Montgomery County, PA, Northampton County, PA
The radar
The Philadelphia radar (KDIX), 96 km from the middle of the area, began a volume at 07:37 UTC, the scan nearest the moment this went out.
Open the radar archive at this moment
The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.
Nearby
Dense Fog Advisories in Pennsylvania, 2025Dense Fog Advisories in New Jersey, 2025Every dense fog advisory in 2025
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; radar from the NEXRAD Level II archive.