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PITTSBURGH (KDKA) -- The National Weather Service says there's a possibility of severe thunderstorms hitting most of southwestern Pennsylvania.

A severe thunderstorm warning was issued in Washington County and southwestern Allegheny County, along with parts of east central Ohio and northern West Virginia.

The warning was in effect until 4:45 p.m. According to the National Weather Service, wind gusts of up to 60 mph and hail were expected.

Many other parts of western Pennsylvania -- including Beaver, Butler, Fayette and Westmoreland counties -- are under a severe thunderstorm watch until 11 p.m.

The National Weather Service says a severe thunderstorm watch means storms are possible in and near that area, while a severe thunderstorm warning means storms are occurring or imminent in that area.