An uncertain forecast. #PAwx   A shift is expected to occur in the jet stream during this coming week and the models are having a tough time predicting the path of the next storm.

Originally, low pressure was expected to move from the US Southwest to the Atlantic coast and then move up as a nor’easter Tuesday night into Wednesday.

Things have changed and now the storm is expected to move up and straight off the coast to our south Monday night into Tuesday morning, ending late morning Tuesday.   Different timing and different amounts of snow.  The GFS has a QPF of about 0.20 inches water, so 2-4 inches is the best guess.

A low confidence forecast right now.