PITTSBURGH (KDKA) — As a line of storms moves toward western Pennsylvania, local counties are under a Severe Thunderstorm Watch.

Allegheny, Beaver, Butler, Clarion, Crawford, Greene, Lawrence, Mercer, Venango, Washington are under a Thunderstorm Watch until 2 a.m. Tuesday.

Earlier this evening, the National Weather Service issued a tornado warning for the southern portion of Mercer County. The storm produced hail and heavy rain.

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