At 4:01 a.m. on Sunday, the National Weather Service released a dense fog advisory valid for Monday between 5 a.m. and 9 a.m. for Westmoreland Ridges, Fayette Ridges and Higher Elevations of Indiana as well as Butler, Clarion, Jefferson, Beaver, Allegheny, Armstrong, Washington, Greene, Westmoreland, Fayette and Indiana counties.

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

"Low visibility could make driving conditions hazardous," explains the weather service. "If driving, slow down, use your headlights, and leave plenty of distance ahead of you."

Navigating fog: Safety tips by the weather service

When a dense fog advisory is issued for your area, it means that widespread dense fog has developed and visibility can plummet to a quarter-mi

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