From the ABC 7 Weather team

Washington D.C. Forecast: Winter Storm Watch for Sunday

December 6, 2013 - 11:12 PM
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A Winter Storm Watch has been issued from Sunday morning into Monday morning.

Overnight:
Rain Ending, Cold
Lows: 30s
Wind: N 10 m.p.h.
Saturday:
Partly Cloudy and Chilly, Breezy at Times
Highs: Low 40s
Wind: NW 10-15 m.p.h.
Sunday:
Mostly Cloudy, Snow, Sleet to Freezing Rain and Rain
Highs: Low 30s
Precipitation: 1-2", Changes Possible

“WINTER STORM WATCH in effect from Sunday morning thru Monday morning for the entire area EXCEPT the Northern Neck and Calvert and St. Mary’s Counties in Maryland. 1 to 2 inches of snow and sleet and a quarter inch or more ice accumulations are possible”

At this point we can tell you what is possible on Sunday…what we expect to happen on Sunday. Because temperature profiles will be so important, we cannot yet tell you for certain, what WILL happen. More rain with slowly falling temperatures WILL continue overnight and perhaps into the morning hours Saturday. Breezy and chilly weather WILL tomorrow with skies becoming partly sunny. Even colder air WILL settle into the region Saturday night. On Sunday, moisture WILL rapidly increase over the area and precipitation WILL begin to fall.. It WILL begin as snow in many areas and then mix with or change to sleet for a period and then change to Freezing Rain.

Eventually, when surface temperatures rise above 32 degrees, the precipitation will become just plain rain. This IS NOT a one size fits all forecast. Different precipitation types with different effects WILL be the story all day Sunday. Adverse to dangerous driving conditions WILL DEVELOP. The most likely areas for this to occur will be along and west of the I-95 corridor. The longer it takes for temperatures to rise above freezing, the greater the chances for these conditions. And in general, the farther north and west you are from D.C, the greater the chances of this happening.

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