Friday, January 29, 2010

Friday evening update...

No real changes to the forecast, as the data remains very consistent. Low pressure over Louisiana will track through the Gulf states tonight and redevelop along the Carolina coast tomorrow. Moisture will spread over the dome of Arctic air that is settling in across the Mid-Atlantic. This air mass is very dry, so it will take some time for the snow to develop, but it should do so during the wee hours of the morning. The most significant snow should occur from mid-morning through the afternoon tomorrow. The heaviest amounts still look to be south of Metro Richmond, from the Tri-Cities to the North Carolina line. The one fly in the ointment there could be a little sleet mixing in.
As I've discussed the last couple of days, there should be rather significant difference in amounts from north to south, as lighter snow will fall from Fredericksburg to DC. On average, I expect about 6-8 inches in Richmond, with higher amounts in Chesterfield County. Locations across Southside Virginia could see locally more than a foot of snow by late tomorrow evening.
To go along with the snow, temperatures will be bitter, averaging in the low to mid 20s during the afternoon and early evening. With gusty breezes, wind chills will be in the teens.
Here's what to expect in your neighborhood:

Metro Richmond/Goochland/Powhatan/Charles City: 6-9 inches
Southern Chesterfield/Tri-Cities/New Kent/Williamsburg/Farmville: 8-12 inches
Southside Virginia: 10 inches +, with locally more than 12 inches
Charlottesville: 4-7 inches
Fredericksburg: 3-5 inches
Northern Neck: 5-9 inches

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