* WHAT. Southwest winds 10 to 15 kt with gusts up to 20 kt expected. * WHERE. Chesapeake Bay from Sandy Point MD to Drum Point MD, Tidal Potomac from Cobb Island MD to Smith Point VA, Eastern Bay, and Choptank River to Cambridge MD and the Little Choptank River. * WHEN. From 2 AM to noon EDT Thursday. * IMPACTS. Conditions will be hazardous to small craft.

SMWLWX The National Weather Service in Sterling Virginia has issued a * Special Marine Warning for. Tidal Potomac from Cobb Island MD to Smith Point VA. Tidal Potomac from Indian Head to Cobb Island MD. * Until 900 PM EDT. * At 726 PM EDT, a severe thunderstorm capable of producing waterspouts was located 7 nm south of Fairview Beach, moving east at 25 knots. HAZARD. Wind gusts 34 knots or greater and waterspouts. SOURCE. Radar indicated. IMPACT. Boaters in small craft could be thrown overboard by suddenly higher winds and waves capsizing their vessel. Waterspouts can easily overturn boats and create locally hazardous seas. * Locations impacted include. Breton Bay, Saint Clements Bay, Westmoreland State Park, Maryland Point, Nanjemoy Creek, Port Tobacco River, Cobb Island, Swan Point, Coltons Point, Mathias Point, U.S. 301 Nice Memorial Bridge, Wicomico River, White Point Beach, Popes Creek, Fairview Beach, and Dahlgren.

* WHAT. South winds 10 to 15 kt with gusts up to 20 kt expected. * WHERE. Chesapeake Bay from Sandy Point MD to Drum Point MD, Tidal Potomac from Cobb Island MD to Smith Point VA, Eastern Bay, and Choptank River to Cambridge MD and the Little Choptank River. * WHEN. Until noon EDT Thursday. * IMPACTS. Conditions will be hazardous to small craft.

* WHAT. Up to one half foot of inundation above ground level expected in low-lying areas near shorelines and tidal waterways. * WHERE. Westmoreland, Richmond, Northumberland, Lancaster, Middlesex and Eastern Essex Counties. * WHEN. From 10 PM EDT this evening through late tonight. * IMPACTS. Shallow flooding is possible in the most vulnerable locations near the waterfront and shoreline.

* WHAT. Flash flooding caused by excessive rainfall continues to be possible. * WHERE. Portions of DC, including the following , District of Columbia, Maryland, including the following areas, Anne Arundel, Central and Southeast Howard, Central and Southeast Montgomery, Northwest Howard, Northwest Montgomery, Prince Georges and Southern Baltimore, and northern Virginia, including the following areas, Arlington/Falls Church/Alexandria, Central and Southeast Prince William/Manassas/Manassas Park, Eastern Loudoun, Fairfax and Northwest Prince William. * WHEN. Until 10 PM EDT this evening. * IMPACTS. Excessive runoff may result in flooding of rivers, creeks, streams, and other low-lying and flood-prone locations. Flooding may occur in poor drainage and urban areas. Low-water crossings may be flooded. * ADDITIONAL DETAILS. - Multiple rounds of heavy showers and thunderstorms will move across the area today into this evening. Rainfall amounts of 1 to 2 inches are likely, with isolated amounts of 3 to 4 inches possible. - Please visit www.weather.gov/safety/flood for flood safety and preparedness information

TORLWX The National Weather Service in Sterling Virginia has issued a * Tornado Warning for. Central Montgomery County in central Maryland. * Until 815 PM EDT. * At 728 PM EDT, a confirmed tornado was located over Germantown, moving east at 25 mph. This is a PARTICULARLY DANGEROUS SITUATION. TAKE COVER NOW! HAZARD. Damaging tornado. SOURCE. Radar confirmed tornado. IMPACT. You are in a life-threatening situation. Flying debris may be deadly to those caught without shelter. Mobile homes will be destroyed. Considerable damage to homes, businesses, and vehicles is likely and complete destruction is possible. * The tornado will be near. Germantown, Rockville, Gaithersburg, Olney, Aspen Hill, Montgomery Village, and Redland around 735 PM EDT. Other locations impacted by this tornadic thunderstorm include Spencerville, Laytonsville, Brookeville, Washington Grove, Sandy Spring, Ednor, Ashton, Brinklow, Derwood, and Burtonsville.

At 743 PM EDT, a confirmed tornado was located over Gaithersburg, moving east at 20 mph. This is a PARTICULARLY DANGEROUS SITUATION. TAKE COVER NOW! HAZARD. Damaging tornado. SOURCE. Weather spotters confirmed tornado. IMPACT. You are in a life-threatening situation. Flying debris may be deadly to those caught without shelter. Mobile homes will be destroyed. Considerable damage to homes, businesses, and vehicles is likely and complete destruction is possible. The tornado will be near. Olney, Aspen Hill, and Redland around 750 PM EDT. Other locations impacted by this tornadic thunderstorm include Derwood, Spencerville, Brookeville, Washington Grove, Sandy Spring, Ednor, Ashton, Brinklow, Burtonsville, and Cloverly.