11/28/2008

Wintry mess to round out the Holiday weekend...



Evening Update:

Its appearing more and more likely like a widespread wintry mix event across much of the interior M-A and N-E as opposed to a traditional snowstorm. Guidance seems to be settling on a double-barrel style synoptic event featuring a primary low developing and lifting north-northeast out of the TN River Valley Saturday Evening. As Low pressure deepens and makes it way into Ohio, it will draw warmer air north bound changing wintry precip over to plain rain south-north for many areas, beginning in the valleys.

Areas along and east of I-81 from northern VA to the I-78 corridor in the Susquehanna River Valley over to I-95 and points north thru the lower Hudson River Valley to the Maine coastline shud be all rain from the start, with chances of any significant wintry precip being virtually nil.

I feel only areas at this point with decent shot at seeing any significant snowfall from this will be the Adirondack Mtn. region of northern New York and the mountains of western Maine into extreme northern Vermont/New Hampshire. Like most other areas, Snow shud be the predominant precip to start...how long the precip remains snow before becoming mixed with sleet is the question. Feel there is a shot at reaching low end warning accumulations in these regions, but will be a challenge. Across northern NY, even a changeover to rain cannot be ruled out, which wud obviously cut down on snow amounts. Across northern New England, a changeover to rain is least likely here, especially over the higher terrain of northern VT/NH and western sections of ME. Significant snow/sleet accumulations are certainly possible across these regions, and will be re-evaluated after 0z model data can be analyzed.

Elsewhere across the remainder of the interior, a sloppy wintry mess is most probable before precip changes over to all rain. Expecting this to be widespread Advisory event with the exception being in the aforementioned areas.

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