Friday, February 10, 2012

Sun To Clouds, Prelude To Cold Shot

Today marks the day before the cold shot's arrival...and you'll see the signs of transition abound.  Clouds increase, that "look" of some precipitation moving in, and a pretty mild day are all in the cards by later on today.  We're starting off with temperatures in the 20's in the suburbs, around 30 in the city and along I-95 this morning with clear to partly cloudy skies through the region.   A patch of clouds that was overhead earlier this morning is moving northeast...leaving us with some clear skies through midday before clouds increase with the approaching tandem of a cold front and the soon-to-develop coastal low pressure system.

Computer guidance last night shifted a bit milder and faster with the onset of precipitation for this upcoming event...which isn't good news for those of you south and east of Philadelphia who wanted snow from this system.  Projections in modeling suggest that we could see rain showers arriving after 7 PM in the fastest of guidance, with after 9 PM the consensus among all three models regarding when precipitation will start.  Given the timing and warmer look, precipitation will start as rain for many before changing to snow north and west of the city as the evening progresses.  The city may hold onto rain a while longer before changing to and ending as a period of snow early Saturday morning.  For those of you south of Atlantic City, it's looking a lot less likely that you'll see much more than a few flakes at the end of the event as the faster arrival of the system and the milder trends will mitigate snow chances.  More forthcoming along with a snowfall projection map.

In terms of temperatures, expect mid and upper 40's across the region today with sun giving way to clouds.  It will be a touch breezy at times with west-southwest breezes around ten miles per hour.