8:25 PM UPDATE: National Weather Service in State College cancels Tornado Watch for Tioga County.
8:07 PM UPDATE: National Weather Service in Binghamton cancels Tornado Watch for Bradford County.
The following weather alerts come from the National Weather Service in Binghamton and the National Weather Service in State College:
Tornado Watch in effect for all of Pennsylvania including Tioga and Bradford counties until 10 pm Tuesday.
Isolated to scattered thunderstorms are expected this afternoon through evening. There is a slight to enhanced risk that a few storms will become severe with damaging winds, large hail, and locally heavy rainfall. An isolated tornado is also possible. Risk for severe thunderstorms will be higher for counties along and south of the state border.