Thursday, December 20, 2012

Damp End To Decreasingly Nice Day

Our weather takes a downhill turn through the course of the day today as low pressure pushes through the Ohio Valley, intensifying and spreading rain northeast towards us as the day progresses.  Rain will be approaching Central Pennsylvania by sunset this afternoon, with rain spreading in across the Delaware Valley tonight.

Rain could be steady to heavy for a time this evening and overnight, with the potential for a few rumbles of thunder along the cold front as it crosses the region after Midnight and as we approach Friday daybreak.  We'll outline this in more detail later on this morning but computer modeling shows the potential for an inch to an inch and a half of rain from Philly to Atlantic City on north with this storm system.  It's going to be a pretty decent soaker, with the cold front a rather potent one as it crosses the region early Friday morning.

Until the rain approaches, skies will trend progressively gray through the course of the day as clouds move in.  It won't be the nicest of days in the region overall as temperatures struggle to move until evening.  We might be a bit optimistic on temperatures by 5 PM as east breezes and gray skies may prevent much upward mobility in temperatures before warmer air pushes in tonight.  It wouldn't surprise us to see some lower 40's or even upper 30's in Allentown as the daytime highs.  East breezes will generally be light for much of the day but increase to 15-20 mph as the storm moves in tonight.