There is an increased risk of light snow in the morning tomorrow as a southern weather disturbance passes through the area. The increased risk will be for areas where precip begins before sunrise. The reason for increasing the risk is the colder temperatures that are already in place as the area is under ideal radiational cooling. Best risk of light accumulations would be Virginia west of a Charlottesville to Roanoke line. I am not expecting more that a dusting to an inch in these areas, but roads could be cold making commutes rough. For the rest of the area, the risk is there that precip could start before dawn. If it does, allow extra time as small events like these are usually the roughest commutes! Once the sun is up, temps appear to rise to start melting and even could transition precip to rain in areas. IF precip begins before sunrise, the rise in temps could be slower.
Be careful!
Of note, we will have the coldest air of the season Sunday and Monday followed by a continues cooler than normal period. In the 7-10 day period there are signals of a potential significant winter storm!
All for now!
Great School in Northern Virginia. http://www.ambleside.org
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