Thursday, January 19, 2012

Some Accumulating Snow On The Way For The Delaware Valley & NYC Areas. Later Friday Night Into Saturday ! A Coating to 1" Possible Tonight.

Discussion and Forecast for The Delaware Valley.
For: Snow/Mix event .... Friday Night into Saturday !
Issued: Thursday 5:00 PM ....Jan 19, 2012


It looks like from later Friday night into Saturday, We finally have a shot at some accumulating snow for much of the Delaware Valley Region. Before getting into this threat over the weekend, it looks like some light snow and snow showers will be moving through the Delaware Valley tonight, mainly from between 8:00 PM to 4:00 AM, from west to east.

A weak clipper system moving to our north and s/w trough, will be the reason for this activity tonight. Some areas will see a Coating to near 1" before ending later tonight. The best chance for near 1" will be N & W of PHL. A general Coating to 1/2" in some spots S and E of PHL over Northern DE and Southern NJ.

Tomorrow will be another dry, but cold day, as high temps remain in the mid to upper 30's. Cloudiness will be on the increase during the late afternoon ahead of our next system.

During Friday a weak area of low pressure and some overrunning precipitation will begin to develop too our south and west, over the Ohio Valley and Tennessee Valley regions. This moisture will then work it's way eastward and into our region Later Friday night.

For Friday Night into Saturday Night !
PHL/Southern NJ/ and Northern DE !


All areas from PHL and points SE, over DE and Southern NJ, will start out as snow, but will mix with and change to sleet and rain during Saturday morning from south to north. The immediate PHL area should remain as snow until near mid and late morning before mixing with and turning to some light rain during the afternoon hours. Northern DE and Southern NJ, will likely see this transition from snow to sleet/rain sometime between 7:00-9:00 AM.

In these areas a quick burst of moderate snow is possible during the morning before mixing occurs, so I'm expecting what we call a quick Thump for an hour or 2, that will leave some light accumulation of snow and sleet. Light Precipitation could change back to some mixed Snow/Sleet and Freezing rain, before ending Saturday evening in these areas.

I'm forecasting a general Coating to 2" of snow accumulation for the PHL Metro area, Interior Southern NJ, and Extreme Northern DE, near Wilmington and Newark. The best chance for 1" or 2" amounts in this zone, will be at PHL. Most of interior Southern NJ and extreme Northern DE will see 1" or less before the changeover occurs.

A Coating is possible from just north of DOV, DE to MIV, NJ to near ACY, NJ.

All Points south and east of this line, from Central/Southern DE and the Southern NJ shore points, will be mainly rain. Only expect a brief start as snow/sleet with little or no snow accumulation expected.

SE PA/Central & NE NJ/ NYC Metro Area.

It now appears that areas to the N & W of PHL over SE PA to near NYC will remain mostly snow and only some mixing with sleet and rain during the early afternoon hours, before tapering off Saturday night. A more prolonged period of moderate snow and thump is more likely in these areas. A general 2" to 4" can be expected in these areas, with a little less accumulation of around 1"-3" for NE NJ and NYC Metro Areas.

The Lehigh Valley/The Pocono's and NW NJ

Mainly snow from Later Friday night into Saturday Evening, snow could be moderate at times and total snow accumulations of 4" to 7" are likely, with more general 3"-5" amounts over the Lehigh Valley area.

Snowfall Map: Click on map to enlarge !





Take Care,
Ruggie

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