Wednesday Midday

Synopsis:  A slow moving cold front has passed through, temperatures have already reached a maximum for Wednesday, as the last part of the "train of moisture" makes its way up the coast today and into tonight.  The very last part should transition to snow as the cold air finally makes its way into the region.  After that high pressure works in for the rest of the forecast, with the chance of morning snow showers in the West Friday Morning.

Short-term:  High temperatures for the state have already occurred with the passing of the front already.  Cold air will slowly creep on in during the day.  As this happens, the heavy rain across much of the state will transition to snow.  The timing on the transition for places across the state will be key on when the cold air comes in.  Pittsburgh looks to transition to snow mid-afternoon, based off of the 12z SKEW-T.  State College looks to transition to snow around 0z based off of the NAM and GFS 0Z forecast SKEW-T.  Scranton transitions later in the evening, around 2z, once again based off of the SKEW-T forecasts.  The question of whether Philly sees snow or not depends on if the cold air reaches the city before the precipitation leaves the region.  Right now the best accumulation of Philly is a coating.  The valleys in SW, Central, and NE PA will see minor accumulations, with higher terrain seeing moderate accumulation.  All snow should be gone by dawn, then we clear out to partly sunny skies for Thursday as a minor high pressure works in for the day.

Long-term:  A deep trough will move through the state late Thursday into Friday, the only system that is on associated this trough is very weak, providing scattered snow showers at best.  Scattered snow showers will be in the forecast for the West and North Central regions of the state Friday Morning, before coming partly cloudy.  High pressure rolls on in from the NW for the weekend.  We remain below the 540dm line and the 0C 850mb temp line, so a cold weekend is on tap.

Kept temperatures near previous shift, with minor changes.