From the US National Weather Service
Hopefully, the last one of these we have to post for a while! You know the drill. Showers will begin to develop later this morning as the cold front crosses, with thunderstorms developing this afternoon. The best chance for thunderstorms and isolated strong wind gusts is in the darker green area south and east of Pittsburgh. Heavy rain and localized flash flooding is possible with areas that see multiple rounds of storms. We’ll begin to clear out from west to east late this afternoon as the front moves through.
Dry weather returns Wednesday, with a low (