From the ABC 7 Weather team

Sunday Storm Getting More Certain

February 17, 2012 - 10:58 AM
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Sunny Today and Saturday

This Afternoon: Sunny and Pleasant but Breezy

Temperatures: 50-55 | Wind: NW 15-20

Saturday: Mostly Sunny, High Clouds PM

Highs: 50-55 | Wind: Light

Sunday: Snow Developing about noon Light North, Heavier South

Temperatures: 32-36 | Snow: 80% Chance

The Sunday storm that existed so far only in computer simulations of weather  is still yet to form in south Texas.  However the trends and the various simulations (our atmosphere does obey the fundamental laws of science) are beginning to converge toward a common solution which gives us increasing confidence of what will happen with this rare (for this winter) winter storm that threatens the DC area. The general cluster of the track of the storm is well to the south of DC and tracking east.  No sign at all that the storm will slow and move up the coast so the threat of a major DC snowstorm (8" or more snow) is still very low (10% chance).  The storm will be a bit slower and well to the south and with enough cold air over and above us, the Sunday precipitation is very likely (80% chance) to be snow, likely beginning by noon.  The mostly likely timing now is snow Sunday afternoon into early Sunday night.  A fairly fast moving storm with a pretty sharp cut off of snow amounts north to south.  Light amounts (1-2") northern Maryland and the heavier, and wetter snows (4" or more) more likely (50% chance) south of DC into Fredericksburg and southern Maryland.  Next updates later this afternoon.

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