* WHAT. Flash flooding caused by excessive rainfall is possible. * WHERE. The District of Columbia, and portions of Maryland, including the following areas, Anne Arundel, Carroll, Cecil, Central and Southeast Howard, Central and Southeast Montgomery, Frederick MD, Northern Baltimore, Northwest Harford, Northwest Howard, Northwest Montgomery, Prince Georges, Southeast Harford, Southern Baltimore and Washington, Virginia, including the following areas, Arlington/Falls Church/Alexandria, Central and Southeast Prince William/Manassas/Manassas Park, Clarke, Culpeper, Eastern Loudoun, Fairfax, Frederick VA, Greene, Madison, Northern Fauquier, Northern Virginia Blue Ridge, Northwest Prince William, Page, Rappahannock, Rockingham, Shenandoah, Southern Fauquier, Warren and Western Loudoun, and West Virginia, including the following areas, Berkeley, Hampshire, Hardy, Jefferson and Morgan. * WHEN. From 2 PM EDT this afternoon through this evening. * IMPACTS. Excessive runoff may result in flooding of rivers, creeks, streams, and other low-lying and flood-prone locations. * ADDITIONAL DETAILS. - Numerous thunderstorms are expected to form and move across the Watch area this afternoon and evening. While thunderstorms will move along at a decent clip, they will be capable of producing very heavy instantaneous rainfall rates, and may exhibit some training motion at times. Multiple rounds of thunderstorms may be possible at any single location. In total, a widespread 1 to 2 inches of rain is expected, with embedded higher totals of 2 to 5 inches. Flash flooding may occur as a result. - Please visit www.weather.gov/safety/flood for flood safety and preparedness information

* WHAT. Flash flooding caused by excessive rainfall is possible. * WHERE. A portion of central Pennsylvania, including the following counties, Adams, Cumberland, Dauphin, Franklin, Lancaster, Lebanon and York. * WHEN. From 2 PM EDT this afternoon through this evening. * IMPACTS. Area creeks and streams are running high and could flood with more heavy rain. * ADDITIONAL DETAILS. - Heavy rain fell over most of the watch area on Monday and Monday night. More thunderstorms are expected later today and early tonight. The wet soils will cause the rain to run off into the already-high streams and creeks. Less than one inch of additional rainfall later today may be enough to cause flash flooding. The greatest risk for flooding is south of the Turnpike. - http://www.weather.gov/safety/flood

* 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, Carroll, Cecil, Central and Southeast Howard, Central and Southeast Montgomery, Frederick MD, Northern Baltimore, Northwest Harford, Northwest Howard, Northwest Montgomery, Prince Georges, Southeast Harford, Southern Baltimore and Washington, Virginia, including the following areas, Arlington/Falls Church/Alexandria, Central and Southeast Prince William/Manassas/Manassas Park, Clarke, Culpeper, Eastern Loudoun, Fairfax, Frederick VA, Greene, Madison, Northern Fauquier, Northern Virginia Blue Ridge, Northwest Prince William, Page, Rappahannock, Rockingham, Shenandoah, Southern Fauquier, Warren and Western Loudoun, and West Virginia, including the following areas, Berkeley, Hampshire, Hardy, Jefferson and Morgan. * WHEN. From 2 PM EDT this afternoon through this evening. * IMPACTS. Excessive runoff may result in flooding of rivers, creeks, streams, and other low-lying and flood-prone locations. * ADDITIONAL DETAILS. - Numerous thunderstorms are expected to form and move across the Watch area this afternoon and evening. While thunderstorms will move along at a faster speed than the past couple of days, they will be capable of producing very heavy instantaneous rainfall rates, and may exhibit some training motion at times. Multiple rounds of thunderstorms may be possible at any single location. In total, a widespread 1 to 2 inches of rain is expected, with embedded higher totals of 3 to 5 inches. Flash flooding may occur as a result. - 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. 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. Eastern Bay. Patapsco River including Baltimore Harbor. * Until 545 PM EDT. * At 348 PM EDT, strong thunderstorms were located along a line extending from 16 nm west of Middle River to 10 nm west of Fort Smallwood State Park to near Reagan National Airport, moving east at 25 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. Kent Narrows Bridge, North Point State Park, Magothy River, Eastern Bay, Dobbins Island, Pooles Island, Herring Bay, Gunpowder River, Sandy Point State Park, Northeast River, Bloody Point Light, Thomas Point Light, Poplar Island, Parsons Island, Fort Smallwood State Park, Pinehurst, Turkey Point, Hart Miller Island, Gibson Island, and Bodkin Point.

For the following areas. 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. Eastern Bay. Patapsco River including Baltimore Harbor. At 406 PM EDT, severe thunderstorms were located along a line extending from 9 nm west of Middle River to near Fort Smallwood State Park to 8 nm west of Mayo, moving east at 25 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. Kent Narrows Bridge, North Point State Park, Eastern Bay, Pooles Island, Herring Bay, Gunpowder River, Sandy Point State Park, Northeast River, Bloody Point Light, Thomas Point Light, Poplar Island, Parsons Island, Fort Smallwood State Park, Pinehurst, Turkey Point, Hart Miller Island, Gibson Island, Bodkin Point, Tolchester Beach, and Worton Point.

* 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, Carroll, Cecil, Central and Southeast Howard, Central and Southeast Montgomery, Frederick MD, Northern Baltimore, Northwest Harford, Northwest Howard, Northwest Montgomery, Prince Georges, Southeast Harford, Southern Baltimore and Washington, Virginia, including the following areas, Arlington/Falls Church/Alexandria, Central and Southeast Prince William/Manassas/Manassas Park, Clarke, Culpeper, Eastern Loudoun, Fairfax, Frederick VA, Greene, Madison, Northern Fauquier, Northern Virginia Blue Ridge, Northwest Prince William, Page, Rappahannock, Rockingham, Shenandoah, Southern Fauquier, Warren and Western Loudoun, and West Virginia, including the following areas, Berkeley, Hampshire, Hardy, Jefferson and Morgan. * WHEN. Until 11 PM EDT this evening. * IMPACTS. Excessive runoff may result in flooding of rivers, creeks, streams, and other low-lying and flood-prone locations. * ADDITIONAL DETAILS. - Numerous thunderstorms are expected to move across the Watch area this afternoon and evening. While thunderstorms will move along at a faster speed than the past couple of days, they will be capable of producing very heavy instantaneous rainfall rates, and may exhibit some training motion at times. Multiple rounds of thunderstorms may be possible at any single location. In total, a widespread 1 to 2 inches of rain is expected, with embedded higher totals of 3 to 5 inches. Flash flooding may occur as a result. - Please visit www.weather.gov/safety/flood for flood safety and preparedness information

THE NATIONAL WEATHER SERVICE HAS ISSUED SEVERE THUNDERSTORM WATCH 481 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 continues to be possible. * WHERE. A portion of central Pennsylvania, including the following counties, Adams, Cumberland, Dauphin, Franklin, Lancaster, Lebanon and York. * WHEN. Until 11 PM EDT this evening. * IMPACTS. Excessive runoff may result in flooding of rivers, creeks, streams, and other low-lying and flood-prone locations. * ADDITIONAL DETAILS. - Widespread showers and thunderstorms are expected this afternoon within a very moist and unstable environment. Maximum rainfall rates of 2-3 inches per hour are anticipated and may overlap with the highly urban corridors as well as compromised terrain due to heavy rainfall last night. Some significant flash flooding impacts are possible. - http://www.weather.gov/safety/flood

FFWLWX The National Weather Service in Sterling Virginia has issued a * Flash Flood Warning for. Northwestern District of Columbia. Southeastern Montgomery County in central Maryland. Western Arlington County in northern Virginia. Fairfax County in northern Virginia. The Northwestern City of Alexandria in northern Virginia. The City of Fairfax in northern Virginia. The City of Falls Church in northern Virginia. * Until 600 PM EDT. * At 254 PM EDT, Doppler radar indicated thunderstorms producing heavy rain across the warned area. Between 0.5 and 1.5 inches of rain have fallen. The expected rainfall rate is 1.5 to 2.5 inches in 1 hour. Additional rainfall amounts of 1 to 2.5 inches are possible in the warned area. Flash flooding is ongoing or expected to begin shortly. HAZARD. Flash flooding caused by thunderstorms. SOURCE. Radar. IMPACT. Flash flooding of small creeks and streams, urban areas, highways, streets and underpasses as well as other poor drainage and low-lying areas. * Some locations that will experience flash flooding include. Arlington. Alexandria. Centreville. Rockville. Bethesda. Gaithersburg. Reston. Annandale. Olney. Springfield. Herndon. Fairfax. Langley Park. Vienna. Falls Church. Mantua. Pimmit Hills. American Legion Bridge. Mclean. Aspen Hill.

At 424 PM EDT, Doppler radar indicated between 1 and 2 inches of rain have fallen. Additional showers are expected with possible thunderstorms into early this evening. Excess runoff will continue into this evening. The water level along the Accotink Creek at Strathmeade Springs has rapidly risen above flood stage. Woodburn Road and Prosperity Avenue are flooded by at least six inches of water. HAZARD. Flash flooding caused by thunderstorms. SOURCE. Radar. IMPACT. Flash flooding of small creeks and streams, urban areas, highways, streets and underpasses as well as other poor drainage and low-lying areas. Some locations that will experience flash flooding include. Arlington. Alexandria. Centreville. Rockville. Bethesda. Gaithersburg. Reston. Annandale. Olney. Springfield. Herndon. Fairfax. Langley Park. Vienna. Falls Church. Mantua. Pimmit Hills. American Legion Bridge. Mclean. Aspen Hill.

THE NATIONAL WEATHER SERVICE HAS ISSUED SEVERE THUNDERSTORM WATCH 481 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 481 IN EFFECT UNTIL 9 PM EDT THIS EVENING FOR THE FOLLOWING AREAS THE DISTRICT OF COLUMBIA IN MARYLAND THIS WATCH INCLUDES 15 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 WESTERN MARYLAND ALLEGANY IN VIRGINIA THIS WATCH INCLUDES 34 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 HIGHLAND ROCKINGHAM IN WEST VIRGINIA THIS WATCH INCLUDES 8 COUNTIES IN EASTERN WEST VIRGINIA GRANT HAMPSHIRE HARDY MINERAL PENDLETON IN PANHANDLE WEST VIRGINIA BERKELEY JEFFERSON MORGAN 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, CUMBERLAND, DAHLGREN, DUNDALK, DUNKIRK, EDGEWOOD, ELDERSBURG, ELKTON, ELLICOTT CITY, ESSEX, FAIRFAX, FALLS CHURCH, FALLSTON, FALMOUTH, FORT ASHBY, FRANKLIN, FREDERICK, FREDERICKSBURG, FRONT ROYAL, FROSTBURG, GAITHERSBURG, GERMANTOWN, GLEN BURNIE, GORDONSVILLE, GREENBELT, GREENFIELD, HAGERSTOWN, HARRISONBURG, HARRISONBURG, HAVRE DE GRACE, HERNDON, HUNTINGTOWN, JOPPATOWNE, KEYSER, LAUREL, LEESBURG, LEXINGTON PARK, LURAY, LUSBY, MADISON, MANASSAS, MANASSAS PARK, MARTINSBURG, MCLEAN, MONTEREY, MOOREFIELD, NORTH BEACH, ODENTON, ORANGE, PARKVILLE, PAW PAW, PETERSBURG, PIKESVILLE, POTOMAC, PRINCE FREDERICK, RANDALLSTOWN, RESTON, ROCKVILLE, ROMNEY, 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.