SMWLWX The National Weather Service in Sterling Virginia has issued a * Special Marine Warning for. Chesapeake Bay from Pooles Island to Sandy Point MD. Chesapeake Bay north of Pooles Island MD. Patapsco River including Baltimore Harbor. * Until 1015 PM EDT. * At 842 PM EDT, a severe thunderstorm capable of producing waterspouts was located 12 nm west of Fort Smallwood Park, 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. Tolchester Beach, North Point State Park, Fort Smallwood Park, Pooles Island, Hart Miller Island, and Sevenfoot Knoll.

* 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 through 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

* WHAT. Flash flooding caused by excessive rainfall continues to be possible. * WHERE. A portion of northern Maryland, including the following area, Southern Baltimore. * 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 through 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

For the following areas. Chesapeake Bay from Pooles Island to Sandy Point MD. Chesapeake Bay north of Pooles Island MD. At 914 PM EDT, a severe thunderstorm capable of producing waterspouts was located over Middle River, moving northeast at 25 knots. HAZARD. Waterspouts and wind gusts 34 knots or greater. 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. Pooles Island.

SMWLWX The National Weather Service in Sterling Virginia has issued a * Special Marine Warning for. Chesapeake Bay from Pooles Island to Sandy Point MD. Chesapeake Bay north of Pooles Island MD. * Until 1000 PM EDT. * At 832 PM EDT, severe thunderstorms capable of producing waterspouts were located along a line extending from Havre De Grace to near Aberdeen Proving Ground to Gunpowder River, moving east at 20 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. Turkey Point, Gunpowder River, Northeast River, Worton Point, Spesutie Island, Aberdeen Proving Ground, and Havre De Grace.

* WHAT. South winds 10 to 15 kt expected with gusts up to 20 kt expected. * WHERE. Chesapeake Bay north of Sandy Point MD, Patapsco River including Baltimore Harbor, and Chester River to Queenstown MD. * WHEN. Until noon EDT Thursday. * IMPACTS. Conditions will be hazardous to small craft.