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. 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

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 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.

TORLWX The National Weather Service in Sterling Virginia has issued a * Tornado Warning for. Southeastern Carroll County in north central Maryland. Northwestern Baltimore County in northern Maryland. * Until 845 PM EDT. * At 806 PM EDT, a severe thunderstorm capable of producing a tornado was located over Gamber, or 10 miles southeast of Westminster, moving northeast at 20 mph. HAZARD. Tornado. SOURCE. Radar indicated rotation. IMPACT. For those in the direct path of a tornado touchdown, flying debris will be dangerous to those caught without shelter. Damage to roofs, siding, and windows may occur. Mobile homes may be damaged or destroyed. Tree damage is likely. * This dangerous storm will be near. Owings Mills, Eldersburg, Reisterstown, Oakland, and Gamber around 810 PM EDT. Cockeysville and Mays Chapel around 825 PM EDT. Timonium and Lutherville-Timonium around 830 PM EDT. Other locations impacted by this tornadic thunderstorm include Finksburg, Glencoe, Hunt Valley, Phoenix, Louisville, Hereford, Glyndon, Sparks, Boring, and Butler.

At 808 PM EDT, a confirmed tornado was located over Gamber, or 9 miles southeast of Westminster, moving northeast at 20 mph. HAZARD. Damaging tornado. SOURCE. Radar confirmed tornado. IMPACT. For those in the direct path of a tornado touchdown, flying debris will be dangerous to those caught without shelter. Damage to roofs, siding, and windows may occur. Mobile homes may be damaged or destroyed. Tree damage is likely. This tornado will be near. Owings Mills and Reisterstown around 815 PM EDT. Cockeysville and Mays Chapel around 825 PM EDT. Other locations impacted by this tornadic thunderstorm include Finksburg, Glencoe, Hunt Valley, Phoenix, Louisville, Hereford, Glyndon, Sparks, Boring, and Butler.

TORLWX The National Weather Service in Sterling Virginia has issued a * Tornado Warning for. Northwestern Anne Arundel County in central Maryland. Southeastern Howard County in central Maryland. Southwestern Baltimore County in northern Maryland. * Until 845 PM EDT. * At 801 PM EDT, a severe thunderstorm with a history of producing tornadoes was located over Olney, moving east at 30 mph. HAZARD. Tornado. SOURCE. Radar indicated rotation. IMPACT. For those in the direct path of a tornado touchdown, flying debris will be dangerous to those caught without shelter. Damage to roofs, siding, and windows may occur. Mobile homes may be damaged or destroyed. Tree damage is likely. * This dangerous storm will be near. Columbia and Savage-guilford around 805 PM EDT. Ellicott City around 810 PM EDT. Elkridge, Historic Ellicott City, and Fort Meade around 815 PM EDT. Severn, Catonsville, and Arbutus around 820 PM EDT. Other locations impacted by this tornadic thunderstorm include Fulton, Hanover, Simpsonville, Clarksville, Ilchester, Savage, Harmans, Scaggsville, Jessup, and Georgetown.

At 816 PM EDT, a confirmed tornado was located near Highland, moving east at 30 mph. HAZARD. Damaging tornado. SOURCE. Radar confirmed tornado. IMPACT. For those in the direct path of a tornado touchdown, flying debris will be dangerous to those caught without shelter. Damage to roofs, siding, and windows may occur. Mobile homes may be damaged or destroyed. Tree damage is likely. This tornado will be near. Columbia, Severn, Elkridge, Ellicott City, Catonsville, Fort Meade, and Savage-guilford around 820 PM EDT. Arbutus around 825 PM EDT. Other locations impacted by this tornadic thunderstorm include Fulton, Hanover, Simpsonville, Harmans, Scaggsville, Ilchester, Savage, Jessup, Georgetown, and Highland.

At 827 PM EDT, a severe thunderstorm capable of producing a tornado was located over Columbia, moving east at 25 mph. HAZARD. Tornado. SOURCE. Radar indicated rotation. IMPACT. For those in the direct path of a tornado touchdown, flying debris will be dangerous to those caught without shelter. Damage to roofs, siding, and windows may occur. Mobile homes may be damaged or destroyed. Tree damage is likely. This dangerous storm will be near. Columbia, Severn, Elkridge, Ellicott City, Catonsville, Arbutus, and Savage-guilford around 830 PM EDT. Other locations impacted by this tornadic thunderstorm include Hanover, Simpsonville, Harmans, Ilchester, Savage, Jessup, and Scaggsville.