Thursday, February 28, 2008

Strong Clipper System Brings a Mix of Snow/Rain, Changing to Wet Snow Friday Night. 1" to 3" Snow Accumulations N & W of PHL.

My Call: For The Delaware & Lehigh Valley Region's.
Clipper Event (Friday Night)

Discussion:
Friday: 6:00 PM

A strong Clipper system will move out of Canada and into the Great Lakes Region tonight, then to the Northern M/A and Southern New England Coast for Friday Night into Saturday Morning. This Clipper will likely produce a period of Snow, mixed with Rain on Friday Evening. A Cold Front, associated with this Clipper will move through Later Friday night, and mixed precip will likely change to Wet Snow, Later Friday Evening into the Overnight Hours. Surface temperatures will be marginal for much accumulation during the early evening on Friday, but temps will drop to near and below the freezing mark, during the overnight hours.

Over much of Eastern PA, Northern DE and Interior Southern/Central NJ, I expect a light mix of Snow/Rain, for early Friday Evening, then a more steady period of light/Moderate snow develops towards the late evening hours. This will be associated with the front moving through the Delaware Valley, later Friday Evening into the overnight hours. This steadier band of Wet Snow, may produce periods of moderate snow, between 9:00 PM and 3:00 AM. As I mentioned in my previous blog, I'm somewhat concerned with quick intensification of this system, as it approaches the coast later Friday night. I'm forecasting this to occur just in time, to give us some induced moisture supply, that will likely enhance this band of precip, as the front is nearing the coast.

So, I'm expecting some snow Accumulation with this system for Friday Night . My Call is for a general 1" to 3" From Near PHL and points North & West into the Lehigh Valley.

The highest amounts will be Well North & West of PHL, where 2" and 3" amounts will be most common near the Lehigh Valley. But overall 1"-2" can be expected for the immediate Northern and western suburbs of PHL.

This General Area Includes: Lancaster (LNS), Reading (RDG), Allentown (ABE) and Trenton (TTN).

For Extreme SE PA, Northern DE, and Interior Southern & Central NJ, I'm forecasting a Coating to 1" of snow, with a few spots in Central NJ receiving closer to 2".

This General Area includes: Philadelphia, PA (PHL) Wilmington, DE (ILG)

From Central DE, into Extreme Southern and Coastal NJ, A "Coating" of snow is Possible for some areas. In these areas mostly rain will fall, but this precip will mix with snow at times. Surface temperatures will be above freezing during much of this event.

This Area Includes: Dover, De (DOV) Millville, NJ (MIV) and Atlantic City, NJ (ACY)

Snowfall Map:
(Click to Enlarge Map)


























My Weekend Outlook:

The weekend is looking good, as our Clipper system moves quickly NE during Saturday AM. High Pressure builds in for later Saturday into Sunday. Seasonably Cold and dry weather can be expected.

Saturday:
M.Cloudy with a few morning flurries, then skies will become P.Sunny during the Afternoon, with Breezy and Seasonably Cold conditions. Highs will be in the Upper 30's to low 40's.

Saturday Night:
Fair and Cold with lows in the low to mid 20's

Sunday:
Mostly Sunny and Seasonably Cold. Highs in the mid 40's. Clear and Cold at night, lows in the Upper 20's to low 30's.

Monday:
Partly Sunny and becoming Milder. Highs in the low to mid 50's.

Take Care,
Ruggie

1 comment:

Anonymous said...

thanks, I will check it out tomorrow to hope that there is no rain for sat. night!