An upper level system will move across the mountains tonight and into Southern Virginia and Central and Eastern North Carolina tonight. A surface low will develop off the North Carolina coast Thursday morning. A Winter Weather Advisory is in effect TONIGHT for all of Southwest Virginia, Southern Virginia along US Highway 58, stretching into portions of Hampton Roads.
Snow will move across Southwest Virginia this evening. There may be a brief period of sleet or rain, but colder air will change the precipitation over to all snow. We’ll have to watch for heavy snow across the mountains stretching eastward into the New River Valley. Although road and ground temperatures are on the warmer side, the moderate to heavy snow will cool the ground and pavement. We expect slick roads by late evening into the overnight.
After Midnight, moderate to heavier bursts of snow will move along US Highway 460 and points south to US Highway 58. Some models show the snow breaking apart as it moves across the mountains. However, the some of the new model guidance keeps it intact across Southern Virginia. If heavier bursts of snow occurs across Southern Virginia, the potential is there for several inches.
Snow will continue to move south and east along US Highway 58 and into Hampton Roads after 3:00 a.m. Thursday. A few heavier bursts will be possible, so we’ll have to monitor latest model guidance today. Light to to moderate snow is likely as far north to the Interstate 64 corridor, with scattered light snow or flurries across North Central Virginia.
By 7:00 a.m. Thursday, snow will move off the coast. There may be a few lingering light snow showers or flurries — but skies will become partly to mostly sunny by mid to late morning Thursday. Gusty winds are expected behind this system. Thursday will be a windy day with wind gusts 20 to 30 mph, with higher gusts up to 35 mph along the coast and in the mountains.
Our latest snowfall forecast calls for up to an inch along the I-64 corridor, with amounts closer to 2 inches south of US Highway 460. Snow accumulations could exceed 2 or 3 inches along US Highway 460 IF the snow comes down heavy and overcomes warm ground and pavement temperatures. Temperatures will fall overnight to near freezing, so there is the chance that many roads will become snow covered — or at the very minimum, areas of slush and ice.
Widespread 2 to 4 inches of snow is expected across the Roanoke area, New River Valley and Southwest Virginia, with 4 to 6 inches of snow across the higher elevations above 3,000 ft. A coating of snow is possible just to the north of I-64. We’ll continue to monitor the latest trends and keep you posted all day on our Virginia Weather Plus Facebook page.