McLean, VA Warnings, Watches and Advisories

When a severe thunderstorm warning is issued, the storm may produce damaging winds, large hail, dangerous lightning, and heavy rain. In some cases, heavy rainfall produced by a severe storm can also lead to flash flooding. Do not drive vehicles through flooded areas. The water depth or fast flowing water/mud/debris from a flash flood will make road conditions unsafe. Do not rely soley on data presented here or other third-party websites - always check your official national and local weather service agency website, socials, radio and/or TV stations for making critical decisions related to weather events.

Please carefully read each posted Warning and Alert as it relates to the area(s) being affected. We may provide a wider range of issued severe weather warnings for surrounding cities and counties, so some alerts may not directly impact this location. This is done to help with preparing for severe weather that may overlap or be heading towards Mclean.

Use the Radar Maps link provided to understand the trajectory of a storm.

Severe Thunderstorm Watch issued September 4 at 12:29AM EDT until September 4 at 2:00AM EDT by NWS Baltimore MD/Washington DC

SEVERE THUNDERSTORM WATCH 652 REMAINS VALID UNTIL 2 AM EDT EARLY THIS MORNING FOR THE FOLLOWING AREAS IN MARYLAND THIS WATCH INCLUDES 5 COUNTIES IN CENTRAL MARYLAND ANNE ARUNDEL PRINCE GEORGES IN SOUTHERN MARYLAND CALVERT CHARLES ST. MARYS IN VIRGINIA THIS WATCH INCLUDES 4 COUNTIES IN CENTRAL VIRGINIA CITY OF FREDERICKSBURG KING GEORGE IN NORTHERN VIRGINIA CITY OF ALEXANDRIA STAFFORD THIS INCLUDES THE CITIES OF ALEXANDRIA, ANNAPOLIS, ARKENDALE, ARNOLD, BOWIE, BROOKFIELD, BROOMES ISLAND, CALIFORNIA, CALLAWAY, CHESAPEAKE BEACH, CLINTON, COLLEGE PARK, COVE POINT, DAHLGREN, DAMERON, DRUM POINT, DUNKIRK, FALMOUTH, FREDERICKSBURG, GARRISONVILLE, GLEN BURNIE, GLENDIE, GREENBELT, LEXINGTON PARK, LONG BEACH, MONTPELIER, MOUNT HARMONY, PINEY POINT, RIDGE, RIDGEWAY, ROLLINS FORK, SEVERN, SEVERNA PARK, SHILOH, SOTTERLEY, SOUTH GATE, ST. CHARLES, SUITLAND-SILVER HILL, TANTALLON, WALDORF, AND WIDEWATER.

Flash Flood Warning issued September 4 at 12:24AM EDT until September 4 at 3:00AM EDT by NWS Baltimore MD/Washington DC

At 1224 AM EDT, emergency management reported multiple water rescues in the vicinity of Commonwealth Road, Glebe Road, and Wilson Avenue with multiple vehicles stalled out in high water. Between 1 and 2 inches of rain have fallen. The expected rainfall rate is 1 to 2 inches in 30 minutes. Additional rainfall amounts of 0.5 to 1 inch are possible in the warned area. Flash flooding is already occurring. HAZARD...Flash flooding caused by thunderstorms. SOURCE...Emergency management reported. 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, Annandale, Springfield, Vienna, Groveton, Falls Church, Huntington, Mantua, Pimmit Hills, Crystal City, Reagan National Airport, Burke, Lincolnia, Tysons Corner, Franconia, Merrifield, Lake Barcroft, I395 and I495 Interchange and Ballston.

Severe Thunderstorm Watch issued September 3 at 8:41PM EDT until September 4 at 2:00AM EDT by NWS Wakefield VA

THE NATIONAL WEATHER SERVICE HAS ISSUED SEVERE THUNDERSTORM WATCH 652 IN EFFECT UNTIL 2 AM EDT FRIDAY FOR THE FOLLOWING AREAS IN MARYLAND THIS WATCH INCLUDES 4 COUNTIES IN SOUTHEAST MARYLAND DORCHESTER SOMERSET WICOMICO WORCESTER IN VIRGINIA THIS WATCH INCLUDES 3 COUNTIES IN EAST CENTRAL VIRGINIA RICHMOND WESTMORELAND IN EASTERN VIRGINIA NORTHUMBERLAND THIS INCLUDES THE CITIES OF CAMBRIDGE, COLONIAL BEACH, CRISFIELD, LEWISETTA, OCEAN CITY, PRINCESS ANNE, SALISBURY, AND WARSAW.

Heat Advisory issued September 3 at 7:37PM EDT until September 4 at 8:00PM EDT by NWS Wakefield VA

* WHAT...Heat index values of 105 to 109 degrees. * WHERE...Portions of central, east central, eastern, south central, and southeast Virginia. * WHEN...From 11 AM to 8 PM EDT Friday. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses. * ADDITIONAL DETAILS...Overnight lows in the mid 70s will not provide much relief from hot daytime temperatures.