* WHAT...Light additional freezing drizzle or wintry mix may continue at times over the next couple of hours, little to no additional accumulation is expected. * WHERE...Portions of north central and western Maryland, northern and northwest Virginia, and eastern and panhandle West Virginia. * WHEN...Until 4 AM EST Monday. * IMPACTS...Travel could be nearly impossible overnight, and the Monday morning commute will be very treacherous due to ongoing cold conditions and lingering sleet and snow packed roadways.