Residents in eastern Massachusetts who have plans for outdoor activities Thursday will want to be wary of the latest forecast by the National Weather Service.

There is a possibility of severe thunderstorms both Thursday and Friday, with the best chance of stronger storms in the western part of the state.

Some of the stronger storms may be accompanied by heavy rain which could lead to flooding. Residents can also expect to large hail and strong damaging wind, and an isolated tornado can't be ruled out, the NWS says.

Highs today will be in the mid 80s.

On Friday, the NWS says the best chance for any strong storms to develop will be in the afternoon and evening south of the Mass Pike.