U.S. National Radar

Comet Ison Viewing Guide

Thursday, December 23, 2010

Weather synopsis: Thursday December 23


10:43pm a cold air mass continues to have a firm grip over the Northeast. Areas of light snow have been impacting coastal regions of the Northeast, these snow flurries are associated with the outer bands of a broad area of low pressure off the coast of New England. No snow accumulation is expected with this system however, I have been monitoring the potential for a significant snowfall to impact the coast this weekend into early next week. A storm system that has been inundating the Southwestern states will make its way across the country through the course of this week. This system will produce a swath of accumulating snow for the Midwest, severe thunder storms for the South and icy conditions for places in between. This mess of precipitation will work its way eastward by Christmas Day producing snow as far south as Atlanta; then a secondary area of low pressure will redevelop off the Southeast coast and depending on the track of this storm system we could have a messy situation in the Northeast on Sunday and Monday. This is a preliminary forecast that is subject to change based on new computer model data: A light snowfall will break out over New York City and Long Island during the afternoon hours on Sunday. The snow will get steadier overnight with the heaviest snow expected early Monday morning before tapering off Monday afternoon and evening. Snowfall totals will increase from west to east with the greatest amounts over Long Island and eastern New England. Generally between 6 inches to as much as 12 inches is certainly possible from this system, however, if the track of this storm veers just 50 miles to the east or west it could mean the difference between no snow to well over 1 foot of snow over the targeted areas. This potential Nor'easter is still days away and I reiterate, this is a preliminary forecast that is subject to change as the time frame approaches.

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