Note: The Dense Fog Advisory has expired for the DC region. The most recent advisory issuance before the expiration is below.
A Dense Fog Advisory is in effect Monday, July 28, 2025 including the following jurisdictions.
MARYLAND: Allegany, Garrett.
WEST VIRGINIA: Grant, Mineral.
Excerpted from the National Weather Service:
…DENSE FOG ADVISORY IN EFFECT UNTIL 9 AM EDT THIS MORNING…
WHAT…Visibility one quarter mile or less in dense fog.
WHERE…In Maryland, Extreme Western Allegany, Central and Eastern Allegany, Western Garrett and Eastern Garrett Counties. In West Virginia, Western Grant, Eastern Grant, Western Mineral and Eastern Mineral Counties.
WHEN…Until 9 AM EDT this morning.
IMPACTS…Hazardous driving conditions due to low visibility.
PRECAUTIONARY/PREPAREDNESS ACTIONS…
If driving, slow down, use your headlights, and leave plenty of distance ahead of you.