From the US National Weather Service
Severe storms will be possible later this afternoon and evening, mainly north of Pittsburgh. Isolated storms may form during the afternoon followed by more widespread coverage this evening. Damaging wind gusts and large hail are the main threat, but a tornado is possible.
There is a Marginal Risk (level 1 of 5) of flooding this evening and tonight, primarily north of Pittsburgh due to multiple rounds of showers and thunderstorms.
