Calm before the storm

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Clouds are breaking up this evening as drier air filters in and high pressure builds across the area.  Winds are breezy but will relax later tonight.  Calmer winds and clearing skies will allow temperatures to drop quickly into the low 20s with some isolated areas even colder in the upper teens.

Sunshine will be brief tomorrow as an easterly flow sets up and two systems head  towards us. Clouds will quickly increase by afternoon keeping highs in the low 30s.  Tomorrow night, light snow will develop after midnight as two systems converge on the area.  One, is an upper level low moving through the Great Lakes, the other, a low which will eject out of the southwest and become a powerful nor’easter.  It has the potential to dump quite a bit of snow in the northern tier of PA and even more across New England.

As of now, it looks like we will see snow starting overnight tomorrow night.  By Friday morning it will start to mix with sleet and possibly freezing rain and there are some indications it may mix or change to rain but all will depend on temperatures and warming in the upper levels. Also, if the upper low phases with the coastal low, that means a more powerful storm.  Temperatures will be very key with this storm and we’ll be watching things very closely.

There looks to be some minor ice and snow accumulations possible at this time for the Lower Susquehanna but much can change as the storm strengthens and moves up the coast.

By the weekend, things quiet down as the storm pulls far away.  High pressure builds bringing dry weather.  Chilly start on Saturday with highs only in the low to mid 30s but by Sunday, we should be in the lower 40s.

The next frontal system arrives overnight Sunday night into Monday bringing with it rain.  Temperatures will be well above freezing and warming into the upper 40s by the afternoon.

Still mild with sunshine on Tuesday then the next system quickly arrives mid-week bringing a chance for rain and or snow.

MaryEllen Pann, Chief Meteorologist

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