The National Weather Service of Pittsburgh has issued a severe thunderstorm warning for southeastern Butler County and parts of three other counties until 6:30 p.m. on Wednesday, June 18.

According to NWS, a severe thunderstorm was located near Sarver at 5:45 p.m. Gusts as strong as 60 miles per hour are expected.

Northeastern Allegheny County, southern Armstrong County and northwestern Indiana County are also under the warning.