Friday, February 15, 2013

Updating Tonight's Precip Approach


Temperatures are starting to drift lower to the city's north and west as precipitation moves on in.  It's down into the 30's in Reading, Lancaster, and York, with a steady band of rain (and snow mixing in) from west of Washington DC northeast through the 222 corridor up into the Poconos, where snow is falling in the higher elevations.  As this line of precipitation pushes east and northeast, colder air continues to drain in from the northwest in the wake of today's run into the upper 50's.  We'll see temperatures continue to slide south through the course of the evening and overnight.

Precipitation will start as rain, fall as rain for about half of the event, then mix and gradually change to snow.  It's sufficiently cold for snow aloft but due to today's mild weather it is taking a while for precipitation to chill the atmosphere and transition that rain over to wet snow.  It is happening, slowly, but it is taking place in spots.  Elevated areas are doing better than valleys as well.

Some spots will pick up a solid inch or two of snow, mostly northwest of the city in higher elevations.  This is shaping up as another coating type event for many, with some not getting much at all.

More:  Current Weather Page