Active Weather Alerts
Special Marine Warning
Issued: 7:01 PM Jul. 31, 2025 – National Weather Service
The National Weather Service in Sterling Virginia has issued a * Special Marine Warning for... Tidal Potomac from Key Bridge to Indian Head MD... * Until 345 PM EDT. * At 301 PM EDT, a strong thunderstorm was located near Alexandria, moving east at 15 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... Tidal Basin, Reagan National Airport, Woodrow Wilson Bridge, Key Bridge, National Harbor, Fort Washington, and Alexandria. PRECAUTIONARY/PREPAREDNESS ACTIONS... && HAIL...0.00IN; WIND...>34KTS
Special Marine Warning
Issued: 6:15 PM Jul. 31, 2025 – National Weather Service
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 345 PM EDT. * At 215 PM EDT, strong thunderstorms were located along a line extending from Fort Hunt to Occoquan Bay to 6 nm northwest of Aquia Creek, moving east at 5 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... Quantico, Fort Washington, Widewater, Gunston Hall, Indian Head, Occoquan Bay, Fort Hunt, Leesylvania State Park, Smallwood State Park, and Brent Point. PRECAUTIONARY/PREPAREDNESS ACTIONS... Move to safe harbor until hazardous weather passes. && HAIL...0.00IN; WIND...>34KTS
Severe Thunderstorm Watch
Issued: 6:00 PM Jul. 31, 2025 – National Weather Service
SEVERE THUNDERSTORM WATCH 562 REMAINS VALID UNTIL 8 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 21 COUNTIES IN CENTRAL VIRGINIA CITY OF FREDERICKSBURG GREENE KING GEORGE 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 CLARKE MADISON RAPPAHANNOCK WARREN IN WEST VIRGINIA THIS WATCH INCLUDES 1 COUNTY IN PANHANDLE WEST VIRGINIA 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, CHESAPEAKE BEACH, CLINTON, COLLEGE PARK, COLUMBIA, 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, HAGERSTOWN, HAVRE DE GRACE, HERNDON, HUNTINGTOWN, JOPPATOWNE, LAUREL, LEESBURG, LEXINGTON PARK, LUSBY, MADISON, MANASSAS, MANASSAS PARK, MCLEAN, NORTH BEACH, ODENTON, ORANGE, PARKVILLE, PIKESVILLE, POTOMAC, PRINCE FREDERICK, RANDALLSTOWN, RESTON, ROCKVILLE, SEVERN, SEVERNA PARK, SHEPHERDSTOWN, SILVER SPRING, SOUTH GATE, SPOTSYLVANIA COURTHOUSE, ST. CHARLES, STANARDSVILLE, STERLING, SUITLAND-SILVER HILL, TOWSON, WALDORF, WARRENTON, WASHINGTON, WASHINGTON, WESTMINSTER, AND WOODBRIDGE.
Severe Thunderstorm Watch
Issued: 6:00 PM Jul. 31, 2025 – National Weather Service
SEVERE THUNDERSTORM WATCH 562 REMAINS VALID UNTIL 8 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
Marine Weather Statement
Issued: 5:14 PM Jul. 31, 2025 – National Weather Service
...GUSTY SOUTH WINDS AND DEVELOPING THUNDERSTORMS... Occasional southerly wind gusts to near 20 knots are possible this afternoon. In addition, thunderstorms will develop and produce gusty winds, heavy downpours and lightning strikes. Mariners should prepare to seek safe harbor.
Flood Watch
Issued: 4:25 PM Jul. 31, 2025 – National Weather Service
...FLOOD WATCH REMAINS IN EFFECT THROUGH LATE TONIGHT... * WHAT...Flash flooding caused by excessive rainfall continues to be possible. * WHERE...The District of Columbia, portions of Maryland, including the following areas, Anne Arundel, Calvert, Carroll, Cecil, Central and Southeast Howard, Central and Southeast Montgomery, Charles, Frederick MD, Northern Baltimore, Northwest Harford, Northwest Howard, Northwest Montgomery, Prince Georges, Southeast Harford, Southern Baltimore and St. Marys, and northern Virginia, including the following areas, Arlington/Falls Church/Alexandria, Central and Southeast Prince William/Manassas/Manassas Park, Eastern Loudoun, Fairfax, Northern Fauquier, Northwest Prince William, Southern Fauquier and Western Loudoun. * WHEN...Through late tonight. * 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. Extensive street flooding and flooding of creeks and rivers are possible. * ADDITIONAL DETAILS... - Significant flash flooding is possible. Numerous showers and thunderstorms will develop and move across the area this afternoon into this evening. Thunderstorms will be capable of producing very heavy rain, with rainfall rates of 1 to 2 inches in 30 minutes. Widespread rainfall amounts of 1 to 2 inches are expected. Some areas could experience multiple rounds of thunderstorms, with higher rainfall amounts of 4 to 6 inches possible. This could result in numerous instances of flash flooding. Showers and thunderstorms will begin early this afternoon, and the heaviest rainfall is most likely from 3 PM to 8 PM. - Please visit www.weather.gov/safety/flood for flood safety and preparedness information. PRECAUTIONARY/PREPAREDNESS ACTIONS... You should monitor later forecasts and be prepared to take action should Flash Flood Warnings be issued. &&
Small Craft Advisory
Issued: 4:08 PM Jul. 31, 2025 – National Weather Service
...SMALL CRAFT ADVISORY IN EFFECT FROM 6 AM FRIDAY TO MIDNIGHT EDT FRIDAY NIGHT... * WHAT...Northeast winds around 10 kt with gusts up to 20 kt expected. * WHERE...Tidal Potomac from Key Bridge to Indian Head MD. * WHEN...From 6 AM Friday to midnight EDT Friday night. * IMPACTS...Conditions will be hazardous to small craft. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. &&
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