At 12:27 a.m. on Sunday, the National Weather Service released a special weather statement until 9 a.m. for Westmoreland Ridges, Fayette Ridges and Higher Elevations of Indiana as well as Mercer, Venango, Forest, Lawrence, Butler, Clarion, Jefferson, Beaver, Allegheny, Armstrong, Washington, Greene, Westmoreland, Fayette and Indiana counties.

"Patchy dense fog is possible this morning, with visibility one-quarter of a mile or less in localized areas. Motorists should be prepared for rapidly fluctuating and locally poor visibility early this morning. Visibility will gradually improve as fog lifts by mid-morning.," comments the weather service.

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