On Wednesday at 11:55 p.m. the National Weather Service released a freezing fog advisory in effect until Thursday at 9 a.m. for Westmoreland Ridges and Higher Elevations of Indiana as well as Mercer, Venango, Forest, Lawrence, Butler, Clarion, Jefferson, Armstrong, Westmoreland and Indiana counties.

The weather service says to anticipate, "Visibility one quarter mile or less in freezing fog."

"Low visibility and a light glaze of ice, especially on bridges and over passes could make driving conditions hazardous," explains the weather service. "If driving, slow down, use your headlights, and leave plenty of distance ahead of you."

What does a freezing fog advisory mean?

When a freezing fog advisory is in effect, it indicates that fog is developing while surface temperatures hover at or d

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