Monday, January 16, 2012

Transitioning To Clouds Later

 It's a cold and mainly clear start across the region as high pressure is in control of our skies this morning.   Temperatures are in the teens nearly everywhere, except the Poconos where single digits reside.  Our cold start will give way to a less cold day today as the aforementioned high moves east and southerly breezes kick in later on today.  Those southerly winds will help push temperatures into the upper 30's for Philadelphia, with mid 30's in the Lehigh Valley and low 40's in South Jersey and Delaware.  Compared to yesterday's 20's, it will feel less cold outside today and more like a typical mid January day.

The retreating high will also allow clouds to increase later on as a storm system in the Midwest pushes east.  Clouds will increase this afternoon from the west.  While we will remain dry through the daylight hours, precipitation chances will increase after 8 or 9 PM west of us, after 11 PM locally, and after Midnight east of the city as light rain moves into the region in advance of the storm system.   Since temperatures over the Lehigh Valley, Berks County, Poconos, and perhaps Upper Bucks County will be marginal for slippery travel, winter weather advisories are out for those places for this evening into early Tuesday morning in case rain freezes on road surfaces.   Some of the upper parts of Montco could be slick -- we're talking above Pottstown and towards Pennsburg -- but the best chances of rain freezing on anything will Lehigh Valley/Berks on north.   Rain thankfully will be light but it doesn't take much to foul up the roads.   We'll have more information as the day progresses.