* WHAT. Southwest winds 10 to 20 kt with gusts up to 30 kt expected. * WHERE. Chesapeake Bay main channel north of Smith Point VA, Tidal Potomac from Cobb Island MD to Smith Point VA, Patapsco River including Baltimore Harbor, 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 1 PM Thursday to 6 AM EDT Friday. * IMPACTS. Conditions will be hazardous to small craft.

* WHAT. Southwest winds 10 to 15 kt with gusts up to 25 kt expected. * WHERE. Tidal Potomac River from Key Bridge to Cobb Island MD, and Patuxent River to Broomes Island MD. * WHEN. From 1 PM to 9 PM EDT Thursday. * IMPACTS. Conditions will be hazardous to small craft.

* WHAT. Southwest winds 10 to 20 kt with gusts up to 30 kt expected. * WHERE. Chesapeake Bay main channel north of Smith Point VA, Tidal Potomac from Cobb Island MD to Smith Point VA, Patapsco River including Baltimore Harbor, 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 1 PM this afternoon to 6 AM EDT Friday. * IMPACTS. Conditions will be hazardous to small craft.

* WHAT. Southwest winds 10 to 15 kt with gusts up to 25 kt expected. * WHERE. Tidal Potomac River from Key Bridge to Cobb Island MD, and Patuxent River to Broomes Island MD. * WHEN. From 1 PM to 9 PM EDT. * 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 Indian Head to Cobb Island MD. Tidal Potomac from Key Bridge to Indian Head MD. * Until 530 PM EDT. * At 326 PM EDT, strong thunderstorms were located along a line extending from 37 nm northwest of Leesylvania State Park to 27 nm west of Quantico to 39 nm west of Aquia Creek, moving east at 40 knots. HAZARD. 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. * Locations impacted include. Potomac Creek, Maryland Point, Nanjemoy Creek, Port Tobacco River, Leesylvania State Park, Smallwood State Park, National Harbor, Quantico, Fort Washington, Tidal Basin, Reagan National Airport, Gunston Hall, Mathias Point, U.S. 301 Nice Memorial Bridge, Mason Neck State Park, Woodrow Wilson Bridge, Indian Head, Occoquan Bay, Fort Hunt, and Popes Creek.

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 645 PM EDT. * At 446 PM EDT, severe thunderstorms were located along a line extending from 11 nm west of Aquia Creek to 54 nm west of Cobham Bay, moving east at 35 knots. HAZARD. Wind gusts in excess of 48 knots. SOURCE. Radar indicated. IMPACT. Boaters could easily be thrown overboard by suddenly higher wind and waves capsizing their vessel. Boats could suffer significant damage in high winds. * Locations impacted include. Yeocomico River, Breton Bay, Saint Clements Bay, Piney Point, Mouth Of The Potomac River, Tall Timbers, Cobb Island, Coltons Point, Swan Point, Coles Point, Saint George Island, Wicomico River, White Point Beach, Westmoreland State Park, and Colonial Beach.

SMWLWX The National Weather Service in Sterling Virginia has issued a * Special Marine Warning for. Chesapeake Bay from North Beach to Drum Point MD. Chesapeake Bay from Pooles Island to Sandy Point MD. Chesapeake Bay from Sandy Point to North Beach MD. Chesapeake Bay north of Pooles Island MD. Chester River to Queenstown MD. Choptank River to Cambridge MD and the Little Choptank River. Eastern Bay. Patapsco River including Baltimore Harbor. Patuxent River to Broomes Island MD. * Until 615 PM EDT. * At 408 PM EDT, severe thunderstorms were located along a line extending from 26 nm north of Key Bridge to near Alexandria to 12 nm west of Aquia Creek, moving east at 50 knots. HAZARD. Wind gusts in excess of 48 knots. SOURCE. Observed wind of 57 knots at Dulles International Airport. IMPACT. Boaters could easily be thrown overboard by suddenly higher wind and waves capsizing their vessel. Boats could suffer significant damage in high winds. * Locations impacted include. Choptank River, Kent Narrows Bridge, North Point State Park, Magothy River, Rock Hall, Chester River, Eastern Bay, Dobbins Island, Blackwalnut Point, Pooles Island, Cuckold Creek, Herring Bay, Gunpowder River, Sandy Point State Park, Northeast River, Bloody Point Light, Thomas Point Light, Calvert Cliffs, Poplar Island, and Parsons Island.

For the following areas. Tidal Potomac from Indian Head to Cobb Island MD. Tidal Potomac from Key Bridge to Indian Head MD. At 402 PM EDT, severe thunderstorms were located along a line extending from 18 nm northwest of Key Bridge to 10 nm northwest of Mason Neck State Park to 17 nm west of Aquia Creek, moving east at 40 knots. HAZARD. Wind gusts in excess of 48 knots. SOURCE. Observed wind of 57 knots at Dulles International Airport. IMPACT. Boaters could easily be thrown overboard by suddenly higher wind and waves capsizing their vessel. Boats could suffer significant damage in high winds. Locations impacted include. Potomac Creek, Maryland Point, Nanjemoy Creek, Port Tobacco River, Leesylvania State Park, Smallwood State Park, National Harbor, Quantico, Fort Washington, Tidal Basin, Reagan National Airport, Gunston Hall, Mathias Point, U.S. 301 Nice Memorial Bridge, Mason Neck State Park, Woodrow Wilson Bridge, Indian Head, Occoquan Bay, Fort Hunt, and Popes Creek.

THE NATIONAL WEATHER SERVICE HAS ISSUED SEVERE THUNDERSTORM WATCH 442 IN EFFECT UNTIL 9 PM EDT THIS EVENING FOR THE FOLLOWING AREAS THIS WATCH INCLUDES THE FOLLOWING ADJACENT COASTAL WATERS CHESAPEAKE BAY NORTH OF POOLES ISLAND MD CHESAPEAKE BAY FROM POOLES ISLAND TO SANDY POINT MD CHESAPEAKE BAY FROM SANDY POINT TO NORTH BEACH MD CHESAPEAKE BAY FROM NORTH BEACH TO DRUM POINT MD CHESAPEAKE BAY FROM DRUM POINT MD TO SMITH POINT VA TIDAL POTOMAC FROM KEY BRIDGE TO INDIAN HEAD MD TIDAL POTOMAC FROM INDIAN HEAD TO COBB ISLAND MD TIDAL POTOMAC FROM COBB ISLAND MD TO SMITH POINT VA PATAPSCO RIVER INCLUDING BALTIMORE HARBOR CHESTER RIVER TO QUEENSTOWN MD EASTERN BAY CHOPTANK RIVER TO CAMBRIDGE MD AND THE LITTLE CHOPTANK RIVER PATUXENT RIVER TO BROOMES ISLAND MD TANGIER SOUND AND THE INLAND WATERS SURROUNDING BLOODSWORTH ISLAND

* WHAT. Flash flooding caused by excessive rainfall is possible. * WHERE. Washington DC, portions of Maryland, including the following areas, Anne Arundel, Central and Southeast Howard, Central and Southeast Montgomery, Prince Georges and Southern Baltimore, and portions of northern Virginia, including the following areas, Arlington/Falls Church/Alexandria and Fairfax. * WHEN. From 3 PM this afternoon to 9 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. * ADDITIONAL DETAILS. - Showers and thunderstorms may produce rainfall rates around 1 inch per hour, with localized totals of 2 to 3 inches possible in areas that receive multiple thunderstorms. This may result in rapid rises on small streams and creeks, and in urban and poor drainage areas. - Please visit www.weather.gov/safety/flood for flood safety and preparedness information.

* WHAT. Southwest winds 10 to 15 kt with gusts up to 25 kt. * WHERE. Chesapeake Bay north of Sandy Point MD, Patapsco River including Baltimore Harbor, and Chester River to Queenstown MD. * WHEN. Until 6 AM EDT Friday. * IMPACTS. Conditions will be hazardous to small craft.

* WHAT. Southwest winds 10 to 15 kt with gusts up to 20 kt. * WHERE. Tidal Potomac from Indian Head to Cobb Island MD, and Patuxent River to Broomes Island MD. * WHEN. Until 9 PM EDT this evening. * IMPACTS. Conditions will be hazardous to small craft.

* WHAT. Southwest winds 10 to 15 kt with gusts up to 25 kt. * WHERE. Tidal Potomac from Key Bridge to Indian Head MD. * WHEN. Until 9 PM EDT this evening. * IMPACTS. Conditions will be hazardous to small craft.

SVRLWX The National Weather Service in Sterling Virginia has issued a * Severe Thunderstorm Warning for. Southeastern Anne Arundel County in central Maryland. Northwestern St. Marys County in southern Maryland. Calvert County in southern Maryland. Southern Prince Georges County in central Maryland. Charles County in southern Maryland. East central Stafford County in northern Virginia. Southeastern Fairfax County in northern Virginia. Southeastern Prince William County in northern Virginia. * Until 530 PM EDT. * At 426 PM EDT, a severe thunderstorm was located over Quantico, moving east at 50 mph. HAZARD. 60 mph wind gusts. SOURCE. Emergency management. IMPACT. Damaging winds will cause some trees and large branches to fall. This could injure those outdoors, as well as damage homes and vehicles. Roadways may become blocked by downed trees. Localized power outages are possible. Unsecured light objects may become projectiles. * Locations impacted include. Stafford, Waldorf, Clinton, Fort Washington, Fort Hunt, La Plata, Fort Belvoir, Shady Side, Chesapeake Beach, Deale, Woodbridge, Prince Frederick, Quantico, Hallowing Point, Aquia Creek, Breezy Point, Sheridan Point, Port Tobacco River, Lake Ridge, and Lorton.

SVRLWX The National Weather Service in Sterling Virginia has issued a * Severe Thunderstorm Warning for. Northwestern St. Marys County in southern Maryland. West central Calvert County in southern Maryland. Southeastern Prince Georges County in central Maryland. Central Charles County in southern Maryland. Southern Stafford County in northern Virginia. Southeastern Orange County in central Virginia. King George County in central Virginia. The City of Fredericksburg in central Virginia. Southeastern Fauquier County in northern Virginia. Southeastern Culpeper County in northern Virginia. Spotsylvania County in central Virginia. * Until 530 PM EDT. * At 442 PM EDT, severe thunderstorms were located along a line extending from 6 miles northwest of Fredericksburg to near Spotsylvania to Mineral, moving east at 50 mph. HAZARD. 60 mph wind gusts. SOURCE. Radar indicated. IMPACT. Damaging winds will cause some trees and large branches to fall. This could injure those outdoors, as well as damage homes and vehicles. Roadways may become blocked by downed trees. Localized power outages are possible. Unsecured light objects may become projectiles. * Locations impacted include. Fredericksburg, La Plata, King George, Dahlgren, Fairview Beach, Nanjemoy Creek, Popes Creek, Hallowing Point, Wicomico River, Potomac Creek, Port Tobacco River, Golden Beach, Massaponax, Spotsylvania, Wicomico, Falmouth, Hughesville, Mechanicsville, Charlotte Hall, and Passapatanzy.

SVRLWX The National Weather Service in Sterling Virginia has issued a * Severe Thunderstorm Warning for. Central Baltimore City in northern Maryland. Anne Arundel County in central Maryland. Southeastern Howard County in central Maryland. Southeastern Baltimore County in northern Maryland. Northeastern Prince Georges County in central Maryland. * Until 530 PM EDT. * At 429 PM EDT, a severe thunderstorm was located over Lanham-Seabrook, or over Greenbelt, moving east at 50 mph. HAZARD. 70 mph wind gusts. SOURCE. Emergency management reports a history of downed trees with this line of storms. IMPACT. Damaging winds will cause some trees and large branches to fall. This could injure those outdoors, as well as damage homes and vehicles. Roadways may become blocked by downed trees. Localized power outages are possible. Unsecured light objects may become projectiles. * Locations impacted include. Baltimore, Columbia, Bowie, Severn, Annapolis, Crofton, Middle River, Elkridge, Riviera Beach, Mayo, Shady Side, Naval Academy, Upper Marlboro, Baltimore-Washington Airport, Severn River, South River, Fort Smallwood State Park, Gibson Island, Bodkin Point, and Sillery Bay.

At 447 PM EDT, a severe thunderstorm was located over La Plata, moving east at 50 mph. HAZARD. 60 mph wind gusts. SOURCE. Emergency management reports a history of downed trees with this line of storms. IMPACT. Damaging winds will cause some trees and large branches to fall. This could injure those outdoors, as well as damage homes and vehicles. Roadways may become blocked by downed trees. Localized power outages are possible. Unsecured light objects may become projectiles. Locations impacted include. Stafford, Waldorf, Clinton, Fort Washington, Fort Hunt, La Plata, Shady Side, Chesapeake Beach, Deale, Prince Frederick, Quantico, Hallowing Point, Aquia Creek, Breezy Point, Port Tobacco River, Sheridan Point, Rosaryville, Friendly, Marlton, and Triangle.

At 523 PM EDT, a severe thunderstorm was located over La Plata, moving east at 15 mph. HAZARD. 60 mph wind gusts. SOURCE. Emergency management. IMPACT. Damaging winds will cause some trees and large branches to fall. This could injure those outdoors, as well as damage homes and vehicles. Roadways may become blocked by downed trees. Localized power outages are possible. Unsecured light objects may become projectiles. Locations impacted include. Waldorf, La Plata, Chesapeake Beach, Prince Frederick, Hallowing Point, Breezy Point, Port Tobacco River, Sheridan Point, Golden Beach, Dunkirk, Saint Charles, Saint Leonard, Accokeek, Bryans Road, Brandywine, Huntingtown, Hughesville, Owings, Baden, and Mechanicsville.

SVRPHI The National Weather Service in Mount Holly NJ has issued a * Severe Thunderstorm Warning for. Northwestern Sussex County in southern Delaware. Southwestern Kent County in central Delaware. Talbot County in eastern Maryland. Southwestern Queen Anne's County in northeastern Maryland. Caroline County in eastern Maryland. * Until 600 PM EDT. * At 522 PM EDT, a severe thunderstorm was located over St. Michaels, or 9 miles west of Easton, moving east at 60 mph. HAZARD. 60 mph wind gusts and penny size hail. SOURCE. Radar indicated. IMPACT. Damage to roofs, siding, trees, and power lines is possible. * Locations impacted include. Easton, Talbot, Denton, Harrington, Bridgeville, Greensboro, Oakland, Ridgely, St. Michaels, Preston, Oxford, Queen Anne, Viola, Smithville, Grasonville, Starr, Copperville, Jumptown, Agner, and Andrewsville.

At 507 PM EDT, severe thunderstorms were located along a line extending from near Nanjemoy Creek to near Port Royal to Ladysmith, moving east at 50 mph. HAZARD. 60 mph wind gusts. SOURCE. Radar indicated. IMPACT. Damaging winds will cause some trees and large branches to fall. This could injure those outdoors, as well as damage homes and vehicles. Roadways may become blocked by downed trees. Localized power outages are possible. Unsecured light objects may become projectiles. Locations impacted include. Fredericksburg, La Plata, King George, Dahlgren, Fairview Beach, Nanjemoy Creek, Popes Creek, Hallowing Point, Wicomico River, Potomac Creek, Port Tobacco River, Golden Beach, Massaponax, Spotsylvania, Wicomico, Falmouth, Hughesville, Mechanicsville, Charlotte Hall, and Passapatanzy.

SVRPHI The National Weather Service in Mount Holly NJ has issued a * Severe Thunderstorm Warning for. Southwestern New Castle County in northern Delaware. Northwestern Kent County in central Delaware. Queen Anne's County in northeastern Maryland. Northeastern Caroline County in eastern Maryland. Kent County in northeastern Maryland. * Until 600 PM EDT. * At 508 PM EDT, severe thunderstorms were located along a line extending from Bel Air South to near Newtown to near Stevensville, moving east at 55 mph. HAZARD. 70 mph wind gusts and penny size hail. SOURCE. Radar indicated. IMPACT. Expect considerable tree damage. Damage is likely to mobile homes, roofs, and outbuildings. * Locations impacted include. Dover, Middletown, Centerville, Smyrna, Chestertown, Centreville, Camden, Clayton, Delaware City, Cheswold, Rock Hall, Church Hill, Millington, Sudlersville, Betterton, Goldsboro, Hartly, Old Town, Hazlettville, and Morgnec.

THE NATIONAL WEATHER SERVICE HAS ISSUED SEVERE THUNDERSTORM WATCH 442 IN EFFECT UNTIL 9 PM EDT THIS EVENING FOR THE FOLLOWING AREAS IN DELAWARE THIS WATCH INCLUDES 3 COUNTIES IN CENTRAL DELAWARE KENT IN NORTHERN DELAWARE NEW CASTLE IN SOUTHERN DELAWARE SUSSEX IN MARYLAND THIS WATCH INCLUDES 4 COUNTIES IN NORTHEAST MARYLAND CAROLINE KENT QUEEN ANNE'S TALBOT IN NEW JERSEY THIS WATCH INCLUDES 16 COUNTIES IN CENTRAL NEW JERSEY MERCER MONMOUTH IN NORTHERN NEW JERSEY HUNTERDON MIDDLESEX MORRIS SOMERSET SUSSEX WARREN IN SOUTHERN NEW JERSEY ATLANTIC BURLINGTON CAMDEN CAPE MAY CUMBERLAND GLOUCESTER OCEAN SALEM IN PENNSYLVANIA THIS WATCH INCLUDES 10 COUNTIES IN EAST CENTRAL PENNSYLVANIA BERKS LEHIGH NORTHAMPTON IN NORTHEAST PENNSYLVANIA CARBON MONROE IN SOUTHEAST PENNSYLVANIA BUCKS CHESTER DELAWARE MONTGOMERY PHILADELPHIA THIS INCLUDES THE CITIES OF ALLENTOWN, ATLANTIC CITY, BETHLEHEM, BLAIRSTOWN, CAMDEN, CENTREVILLE, CHERRY HILL, CHESTERTOWN, DENTON, DEPTFORD, DOVER, DOYLESTOWN, EAST BRUNSWICK, EASTON, EASTON, EDISON, FLEMINGTON, FREEHOLD, GEORGETOWN, GLASSBORO, HAMMONTON, JIM THORPE, MEDIA, MILLVILLE, MOORESTOWN, MORRISTOWN, MOUNT HOLLY, NEW BRUNSWICK, NEWTON, NORRISTOWN, NORTH BRUNSWICK TOWNSHIP, OCEAN CITY, PENNSVILLE, PERTH AMBOY, PHILADELPHIA, READING, SAYREVILLE, SOMERSET, STROUDSBURG, TOMS RIVER, TRENTON, WEST CHESTER, AND WILMINGTON.

THE NATIONAL WEATHER SERVICE HAS ISSUED SEVERE THUNDERSTORM WATCH 442 IN EFFECT UNTIL 9 PM EDT THIS EVENING FOR THE FOLLOWING AREAS THE DISTRICT OF COLUMBIA IN MARYLAND THIS WATCH INCLUDES 14 COUNTIES IN CENTRAL MARYLAND ANNE ARUNDEL HOWARD MONTGOMERY PRINCE GEORGES IN NORTH CENTRAL MARYLAND CARROLL FREDERICK WASHINGTON IN NORTHEAST MARYLAND CECIL IN NORTHERN MARYLAND BALTIMORE BALTIMORE CITY HARFORD IN SOUTHERN MARYLAND CALVERT CHARLES ST. MARYS IN VIRGINIA THIS WATCH INCLUDES 33 COUNTIES IN CENTRAL VIRGINIA ALBEMARLE CITY OF CHARLOTTESVILLE CITY OF FREDERICKSBURG GREENE KING GEORGE NELSON ORANGE SPOTSYLVANIA IN NORTHERN VIRGINIA ARLINGTON CITY OF ALEXANDRIA CITY OF FAIRFAX CITY OF FALLS CHURCH CITY OF MANASSAS CITY OF MANASSAS PARK CULPEPER FAIRFAX FAUQUIER LOUDOUN PRINCE WILLIAM STAFFORD IN NORTHWEST VIRGINIA CITY OF WINCHESTER CLARKE FREDERICK MADISON PAGE RAPPAHANNOCK SHENANDOAH WARREN IN WESTERN VIRGINIA AUGUSTA CITY OF HARRISONBURG CITY OF STAUNTON CITY OF WAYNESBORO ROCKINGHAM IN WEST VIRGINIA THIS WATCH INCLUDES 2 COUNTIES IN PANHANDLE WEST VIRGINIA BERKELEY JEFFERSON THIS INCLUDES THE CITIES OF ABERDEEN, ALEXANDRIA, ANNAPOLIS, ARLINGTON, ARNOLD, ASPEN HILL, BALLENGER CREEK, BALTIMORE, BEL AIR, BERRYVILLE, BETHESDA, BOWIE, CALIFORNIA, CAMP SPRINGS, CATONSVILLE, CHANTILLY, CHARLES TOWN, CHARLOTTESVILLE, CHESAPEAKE BEACH, CLINTON, COLLEGE PARK, COLUMBIA, CROZET, CULPEPER, DAHLGREN, DUNDALK, DUNKIRK, EDGEWOOD, ELDERSBURG, ELKTON, ELLICOTT CITY, ESSEX, FAIRFAX, FALLS CHURCH, FALLSTON, FALMOUTH, FREDERICK, FREDERICKSBURG, FRONT ROYAL, GAITHERSBURG, GERMANTOWN, GLEN BURNIE, GORDONSVILLE, GREENBELT, GREENFIELD, HAGERSTOWN, HARRISONBURG, HARRISONBURG, HAVRE DE GRACE, HERNDON, HUNTINGTOWN, JOPPATOWNE, LAUREL, LEESBURG, LEXINGTON PARK, LURAY, LUSBY, MADISON, MANASSAS, MANASSAS PARK, MARTINSBURG, MCLEAN, NORTH BEACH, ODENTON, ORANGE, PARKVILLE, PIKESVILLE, POTOMAC, PRINCE FREDERICK, RANDALLSTOWN, RESTON, ROCKVILLE, SEVERN, SEVERNA PARK, SHENANDOAH, SHEPHERDSTOWN, SILVER SPRING, SOUTH GATE, SPOTSYLVANIA COURTHOUSE, ST. CHARLES, STANARDSVILLE, STANLEY, STAUNTON, STAUNTON, STERLING, STRASBURG, SUITLAND-SILVER HILL, TOWSON, WALDORF, WARRENTON, WASHINGTON, WASHINGTON, WAYNESBORO, WAYNESBORO, WESTMINSTER, WINCHESTER, WINCHESTER, WOODBRIDGE, AND WOODSTOCK.