Heat Advisory: Mercer; Venango; Forest; Lawrence; Butler; Clarion; Jefferson; Beaver; Allegheny; Armstrong; Washington; Greene; Westmoreland; Westmoreland Ridges; Fayette; Indiana; Higher Elevations of Indiana; Hancock; Brooke; Ohio; Marshall; Wetzel; Marion; Monongalia

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Heat Advisory — Mercer; Venango; Forest; Lawrence; Butler; Clarion; Jefferson; Beaver; Allegheny; Armstrong; Washington; Greene; Westmoreland; Westmoreland Ridges; Fayette; Indiana; Higher Elevations of Indiana; Hancock; Brooke; Ohio; Marshall; Wetzel; Marion; Monongalia Severity: Moderate. Certainty: Likely. * WHAT...Heat index values up to 105 expected with limited relief during the overnight hours. * WHERE...Portions of northwest, southwest, and western Pennsylvania and northern and the northern panhandle of West Virginia. * WHEN...From 11 AM this morning to 10 PM EDT Friday. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses.