Baltimore, MD – Freezing fog is reducing visibility to one-quarter mile or less across parts of Maryland and West Virginia, creating hazardous travel conditions through 11 a.m. Friday.
According to the National Weather Service Baltimore/Washington office, a Freezing Fog Advisory remains in effect for Carroll, Frederick, Washington, and Northern Baltimore counties in Maryland, as well as Berkeley and Jefferson counties in West Virginia.
The advisory warns that visibility may drop to a quarter mile or less in areas of freezing fog. The fog can deposit a thin glaze of ice on untreated surfaces, including bridges, overpasses, and secondary roads. Even when pavement appears wet, temperatures near or below freezing may allow icy patches to develop.
Forecasters state the advisory will remain in effect until 11 a.m. EST Friday, with gradual improvement expected late in the morning as temperatures rise and visibility increases.
Low visibility could make driving conditions hazardous, particularly during the morning commute. Transportation officials advise drivers to reduce speed, use headlights, and maintain extra distance between vehicles. Sudden visibility drops are possible, especially in rural valleys and low-lying areas.
Freezing fog events are most common during calm wind conditions and subfreezing temperatures, when moisture near the surface condenses and freezes on contact.
Motorists, including student drivers and early-shift workers, are encouraged to allow extra travel time and remain alert for slick spots.
Drivers encountering dense fog should avoid abrupt braking and remain cautious at intersections where visibility may be sharply reduced.
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