...WINTER WEATHER ADVISORY IN EFFECT FROM 10 PM THIS EVENING TO 11 AM EST THURSDAY... * WHAT...Snow expected. Plan on slippery road conditions, including during the morning commute on Thursday. Total snow accumulations of up to one inch are expected. * WHERE...In Maryland, Frederick MD. In Virginia, Southern Fauquier and Eastern Loudoun. * WHEN...From 10 PM this evening to 11 AM EST Thursday. * ADDITIONAL DETAILS...Very cold conditions mean that snow will quickly stick on roads and sidewalks...making the Thursday morning commute dangerous. Plan ahead and allow extra time to get to your destination if traveling late Wednesday night or Thursday. Bitterly cold conditions will follow for late Thursday through the weekend causing snow to remain on untreated surfaces. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Winter Weather Advisory for snow means periods of snow will cause primarily travel difficulties. Be prepared for snow covered roads and limited visibilities, and use caution while driving. The latest road conditions for the state you are calling from can be obtained by calling 5 1 1. By The National Weather Service,Sterling, Va.