The advisory was for Fayette Ridges as well as Beaver, Allegheny, Washington, Greene and Fayette counties.

"Patchy areas of dense fog may linger, but the overall area trends indicate improving visibilities that will continue through the rest of the morning. The overall dense fog threat is ending," according to the National Weather Service.

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-mile or less. These conditions pose challenges for travel, so exercise extra caution on the road or consider postponing your trip if possible.

If driving in fog becomes unavoidable, remember these safety tips:

Reduce speed:

Slow down and allocate extra travel t

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