There is a potential for hazardous commuting conditions for this afternoon and evening commute. A period of snow is POSSIBLE (a 30 to 50 percent chance) this afternoon and evening across the Baltimore and Washington metro areas with up to a half inch of accumulation on area roads. If this threat does materialize this afternoon and evening rush- hour, many roads could quickly turn snow covered. This could lead to dangerous traveling conditions on untreated surfaces. If commuting this afternoon and evening, be aware of the POSSIBILITY of travel disruptions. Plan ahead by allowing for extra travel time. Stay tuned for updates on this potential winter weather episode.

* WHAT. Northwest winds 10 to 15 kt with gusts up to 25 kt expected. * WHERE. Chesapeake Bay from Pooles Island MD to Smith Point VA, Tidal Potomac from Cobb Island MD to Smith Point VA, Chester River to Queenstown MD, Eastern Bay, Choptank River to Cambridge MD and the Little Choptank River, and Tangier Sound and the inland waters surrounding Bloodsworth Island. * WHEN. From 11 PM this evening to noon EST Friday. * IMPACTS. Conditions will be hazardous to small craft.