Precipitation will overspread the area through the late evening and overnight. While some rain is possible at the onset, a changeover to snow is likely. Bands of snow with brief moderate to heavy rates are possible, which could provide quick accumulations of a coating to an inch and reduce visibility to less than one half mile. By the time snow ends early Sunday morning, some localized totals of 1 to 2 inches are possible. Overall, precipitation may only last 2 to 4 hours at any given location. Temperatures will drop below freezing by daybreak, so any areas that are wet could freeze, especially on untreated and elevated surfaces. If you are traveling and encounter adverse winter driving conditions, reduce speed and make sure headlights are on.

* WHAT. For the Gale Warning, northwest winds 15 to 25 kt with gusts up to 35 kt expected. For the Small Craft Advisory, northwest winds 15 to 25 kt with gusts up to 30 kt expected. * WHERE. Tidal Potomac River from Key Bridge to Cobb Island MD, Chesapeake Bay north of Sandy Point MD, Patapsco River including Baltimore Harbor, and Chester River to Queenstown MD. * WHEN. For the Gale Warning, from 6 AM to 6 PM EST Sunday. For the Small Craft Advisory, from 6 PM Sunday to 6 AM EST Monday. * IMPACTS. Strong winds will cause hazardous waves which could capsize or damage vessels.

* WHAT. For the Gale Warning, northwest winds 15 to 25 kt with gusts up to 35 kt expected. For the Small Craft Advisory, northwest winds 15 to 25 kt with gusts up to 30 kt expected. * WHERE. Tidal Potomac River from Key Bridge to Cobb Island MD, Chesapeake Bay north of Sandy Point MD, Patapsco River including Baltimore Harbor, and Chester River to Queenstown MD. * WHEN. For the Gale Warning, from 6 AM to 6 PM EST Sunday. For the Small Craft Advisory, from 6 PM Sunday to 6 AM EST Monday. * IMPACTS. Strong winds will cause hazardous waves which could capsize or damage vessels.

* WHAT. Snow expected. Total snow accumulations between 1 and 3 inches. Localized totals of 4 to 5 inches are possible, especially across northern Frederick, Carroll, Baltimore, Harford, and Carroll counties. * WHERE. Carroll, Frederick MD, Northern Baltimore, and Northwest Harford Counties. * WHEN. Until 7 AM EST Sunday. * IMPACTS. Plan on slippery road conditions. * ADDITIONAL DETAILS. Precipitation may briefly start as rain in some locations this evening but quickly turn to snow. A narrow band of heavier snow may develop during the late evening and overnight which could produce more rapid accumulations and visibility less than one half mile. Highest totals look to be just north of I-695 and I-70. Other roadways likely to see impacts include MD-136, MD-145, MD-24, and I-83 points north toward the PA/ MD line.

* WHAT. Snow expected. Total snow accumulations between 1 and 3 inches. * WHERE. Portions of DC, central, northeast, northern, and southern Maryland, and northern Virginia. * WHEN. From midnight tonight to 10 AM EST Sunday. * IMPACTS. Plan on slippery road conditions. * ADDITIONAL DETAILS. Precipitation may briefly start as rain in some locations this evening but quickly turn to snow. A narrow band of heavier snow may develop during the late evening and overnight which could produce more rapid accumulations and visibility less than one half mile.

* WHAT. Snow expected. Total snow accumulations between 1 and 3 inches. Localized 4 to 5 inch totals across the Catoctin Mountains. * WHERE. Frederick MD County. * WHEN. From 8 PM this evening to 7 AM EST Sunday. * IMPACTS. Plan on slippery road conditions. * ADDITIONAL DETAILS. A rain snow mix will likely start between 7-10pm with a transition to snow after 10pm. Highest impacts will be across northern portions of the county north of Frederick. Slick travel is likely across the MD-140 corridor and US-15 corridor from Catoctin Furnace points north toward the PA/MD line. Additional slick travel concerns can be expected along MD-550 from Sabillasville to Thurmont. Use caution if traveling in these areas late tonight into Sunday morning.

* WHAT. Snow expected. Total snow accumulations between 1 and 3 inches. * WHERE. Portions of DC, central, northeast, northern, and southern Maryland, and northern Virginia. * WHEN. From midnight tonight to 10 AM EST Sunday. * IMPACTS. Plan on slippery road conditions. * ADDITIONAL DETAILS. Precipitation may briefly start as rain in some locations this evening but quickly turn to snow. A narrow band of heavier snow may develop during the late evening and overnight which could produce more rapid accumulations and visibility less than one half mile.

* WHAT. For the Gale Warning, northwest winds 15 to 25 kt with gusts up to 35 kt expected. For the Small Craft Advisory, northwest winds 15 to 25 kt with gusts up to 30 kt expected. * WHERE. Tidal Potomac River from Key Bridge to Cobb Island MD, Chesapeake Bay north of Sandy Point MD, Patapsco River including Baltimore Harbor, and Chester River to Queenstown MD. * WHEN. For the Gale Warning, from 6 AM to 6 PM EST Sunday. For the Small Craft Advisory, from 6 PM Sunday to 6 AM EST Monday. * IMPACTS. Strong winds will cause hazardous waves which could capsize or damage vessels. Light freezing spray is also possible over the open channel Sunday afternoon through Sunday night.

* WHAT. For the Gale Warning, northwest winds 15 to 25 kt with gusts up to 35 kt expected. For the Small Craft Advisory, northwest winds 15 to 25 kt with gusts up to 30 kt expected. * WHERE. Tidal Potomac River from Key Bridge to Cobb Island MD, Chesapeake Bay north of Sandy Point MD, Patapsco River including Baltimore Harbor, and Chester River to Queenstown MD. * WHEN. For the Gale Warning, from 6 AM to 6 PM EST Sunday. For the Small Craft Advisory, from 6 PM Sunday to 6 AM EST Monday. * IMPACTS. Strong winds will cause hazardous waves which could capsize or damage vessels. Light freezing spray is also possible over the open channel Sunday afternoon through Sunday night.

* WHAT. Snow expected. Total snow accumulations between 1 and 3 inches. Localized totals of 4 to 5 inches across portions of Harford and Cecil counties. * WHERE. Portions of DC, central, northeast, and northern Maryland, and northern Virginia. * WHEN. From midnight tonight to 10 AM EST Sunday. * IMPACTS. Plan on slippery road conditions. * ADDITIONAL DETAILS. Precipitation may briefly start as rain in some locations but quickly turn to snow. A narrow band of heavier snow may develop between 1 and 5 AM which could produce more rapid accumulations and visibility less than one half mile.

* WHAT. Snow expected. Total snow accumulations between 1 and 3 inches. Localized totals of 4 to 5 inches are possible, especially across Baltimore and northeastern Maryland. * WHERE. Portions of DC, central, north central, northeast, and northern Maryland, and northern Virginia. * WHEN. From 8 PM this evening to 7 AM EST Sunday. * IMPACTS. Plan on slippery road conditions. * ADDITIONAL DETAILS. Precipitation may briefly start as rain in some locations this evening but quickly turn to snow. A narrow band of heavier snow may develop during the late evening and overnight which could produce more rapid accumulations and visibility less than one half mile.

* WHAT. For the Gale Warning, northwest winds 15 to 25 kt with gusts up to 35 kt expected. For the Small Craft Advisory, northwest winds 15 to 25 kt with gusts up to 30 kt expected. * WHERE. Tidal Potomac River from Key Bridge to Cobb Island MD, Chesapeake Bay north of Sandy Point MD, Patapsco River including Baltimore Harbor, and Chester River to Queenstown MD. * WHEN. For the Gale Warning, from 6 AM to 6 PM EST Sunday. For the Small Craft Advisory, from 6 PM Sunday to 6 AM EST Monday. * IMPACTS. Strong winds will cause hazardous waves which could capsize or damage vessels.

* WHAT. For the Gale Warning, northwest winds 15 to 25 kt with gusts up to 35 kt expected. For the Small Craft Advisory, northwest winds 15 to 25 kt with gusts up to 30 kt expected. * WHERE. Tidal Potomac River from Key Bridge to Cobb Island MD, Chesapeake Bay north of Sandy Point MD, Patapsco River including Baltimore Harbor, and Chester River to Queenstown MD. * WHEN. For the Gale Warning, from 6 AM to 6 PM EST Sunday. For the Small Craft Advisory, from 6 PM Sunday to 6 AM EST Monday. * IMPACTS. Strong winds will cause hazardous waves which could capsize or damage vessels.

* WHAT. For the Gale Warning, northwest winds 15 to 25 kt with gusts up to 35 kt expected. For the Small Craft Advisory, northwest winds 15 to 25 kt with gusts up to 30 kt expected. * WHERE. Tidal Potomac River from Key Bridge to Cobb Island MD, Chesapeake Bay north of Sandy Point MD, Patapsco River including Baltimore Harbor, and Chester River to Queenstown MD. * WHEN. For the Gale Warning, from 6 AM to 6 PM EST Sunday. For the Small Craft Advisory, from 6 PM Sunday to 6 AM EST Monday. * IMPACTS. Strong winds will cause hazardous waves which could capsize or damage vessels.

* WHAT. For the Gale Warning, northwest winds 15 to 25 kt with gusts up to 35 kt expected. For the Small Craft Advisory, northwest winds 15 to 25 kt with gusts up to 30 kt expected. * WHERE. Tidal Potomac River from Key Bridge to Cobb Island MD, Chesapeake Bay north of Sandy Point MD, Patapsco River including Baltimore Harbor, and Chester River to Queenstown MD. * WHEN. For the Gale Warning, from 6 AM to 6 PM EST Sunday. For the Small Craft Advisory, from 6 PM Sunday to 6 AM EST Monday. * IMPACTS. Strong winds will cause hazardous waves which could capsize or damage vessels.

* WHAT. Snow expected. Total snow accumulations between 1 and 3 inches. Localized totals of 4 to 5 inches are possible, especially across Baltimore and northeastern Maryland. * WHERE. Washington DC, and portions of central and northern Maryland, and northern Virginia. * WHEN. From 8 PM this evening to 7 AM EST Sunday. * IMPACTS. Plan on slippery road conditions. * ADDITIONAL DETAILS. Precipitation may briefly start as rain in some locations this evening but quickly turn to snow. A narrow band of heavier snow may develop during the late evening and overnight which could produce more rapid accumulations and visibility less than one half mile.

* WHAT. Northwest winds 20 to 30 kt with gusts up to 40 kt and waves 2 to 5 ft possible. * WHERE. Tidal Potomac River from Key Bridge to Smith Point VA, and Chesapeake Bay and adjoining estuaries north of Smith Point VA. * WHEN. From Sunday morning through late Sunday night. * IMPACTS. Strong winds can cause hazardous waves which could capsize or damage vessels.

* WHAT. Northwest winds 20 to 30 kt with gusts up to 35 kt and waves 2 to 4 ft possible. * WHERE. Tidal Potomac River from Key Bridge to Smith Point VA, and Chesapeake Bay and adjoining estuaries north of Smith Point VA. * WHEN. From Sunday morning through late Sunday night. * IMPACTS. Strong winds can cause hazardous waves which could capsize or damage vessels.