Tuesday, January 10, 2012

Tracking the Potential for Snow this Weekend

The pattern for the upcoming weekend continues to look interesting, and several models are now agreeing on bringing some light snow into the area Sunday morning. The nor'easter the GFS was trying to blow up over the area on Monday is gone in the medium range solution, but both the GFS and ECMWF (Euro) are showing a shortwave clipper swinging through the region after very cold air has settled into the state. The GFS has actual precipitation (snow) depicted, while the Euro is dry with generally the same upper-level pattern. Based on the PVA that should be present ahead of the clipper that the Euro is showing, snow would likely be generated in the same manner as the GFS solution. The NAM only goes to 84 hours from the current time, so we can't see what it says for Sunday, but what it does show is in agreement with a short wave affecting the region by Sunday. The amount of snow should be on the light side, but the surface temps will be plenty cold enough for whatever falls to stick. This scenario is still about 4.5 days out, so things will change, but it's the only decent chance I see for us in the next week. I'll have another update tomorrow. -Zach

Dense Fog Tuesday Morning

After Monday's rain, winter mix, and snow (in northern and western Virginia), low-level moisture at the ground remains high causing fog to develop in most of the Commonwealth. The fog is particularly dense in the western third of the state, where some locations there are under a Dense Fog Advisory until mid-morning for significantly reduced visibilities to a quarter of a mile or less.

Visibilities are reduced elsewhere in central Virginia outside of the Advisory, though, so please use caution on your commute this morning. The fog can be at its densest in low-lying spots, along waterways, and in agricultural areas. Use your fog lights or low-beam settings while driving this morning, even after sunrise.

I mentioned the snow from yesterday in parts of Virginia. Here's a beautiful shot of the snow falling Monday in King George, VA by Breanna Marini:

This photo was posted on my Facebook page by Breanna. You can share your snow pictures, at my page by clicking here, too.

--Meteorologist Carrie Rose
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