A slow-moving storm system will bring multiple rounds of showers and thunderstorms to the D.C. region through Monday, potentially producing flash flooding conditions.
The National Weather Service has issued a flash flood watch until midnight Sunday for large parts of the D.C. metro area, as ground stop have impacted Reagan National, BWI Marshall and Dulles International airports for several hours.
7News First Alert Meteorologist Mark Peña said that while a few stronger storms are possible for most of Sunday afternoon, especially west of Interstate 95, periods of heavy rain could produce flooding concerns.
Storm-related alerts:
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- Flash flood watch runs until midnight Sunday for Northern Virginia and large parts of Anne Arundel, Howard, Montgomery, and Prince George’s counties.
The National Weather Service said widespread showers and thunderstorms have the potential to become severe, with damaging wind gusts the main severe-weather threat.
Drivers are urged to be cautious as some roadways across the D.C. region have become partially flooded.
The unsettled pattern continues Monday with periods of rain and thunderstorms in a warm, humid air mass. Daily chances for showers and storms remain in the forecast through at least the middle of the week, Peña said.
The National Weather Service said daily chances for showers and thunderstorms are expected to persist through the end of the week.
Storm damage felt through region
As at-times heavy storms stomped through the area, they definitely left their mark.
On Avalon Drive, off Massachusetts Avenue, a large tree limb fell, pulled wires down and damaged the pole, During that, a nearby transformer blew, a tree caught on fire and caused isolated power outages in that area.
Update – Avalon Dr, Wood Acres, off Massachusetts Ave, large tree limb fell, pulled wires down, damaged pole & wires, nearby transformer blew, tree caught on fire, isolated power out in area https://t.co/L8K5lnjlDX pic.twitter.com/Now6y42Fg4
— Pete Piringer (@mcfrsPIO) August 2, 2026
There are outages in the region as well, the majority of reports being recorded in Virginia. The latest figures are around 9,000 cases.
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FORECAST
TONIGHT: WEATHER ALERT
Scattered thunderstorms
Lows: 70-75
Winds: South 5-10 mph
Scattered showers and embedded thunderstorms will continue to trek across the Mid-Atlantic with heavy rain that will increase the flash flooding threat. It is very difficult to know how deep water is over a roadway, especially at night, so remember to turn around, don’t drown.
TOMORROW:
Cloudy, areas of rain
Highs: around 85
Winds: South 5-10 mph
Slow moving, heavy thunderstorms continue through Monday with torrential rains continuing the flash flooding threat. It will be mostly cloudy, warm and humid, with locally gusty winds, frequent lightning and isolated flash flooding possible. Highs will generally be in the middle 80s.
TUESDAY:
Mostly cloudy, storm chance
Highs: 83-88
Winds: Southeast 5-10 mph
A mostly cloudy and dry day, but isolated showers and storms return overnight into Wednesday morning.
WEDENSDAY:
Partly cloudy, storm chance
Highs: 85-90
Winds: South 5-10 mph
A few more breaks in the clouds could lead to more sunshine and slightly hotter temperatures. However, this will likely further destabilize the atmosphere leading to additional chances for showers and storms.
THURSDAY:
Partly cloudy, storm chance
Highs: 86-91
Winds: South 5-10 mph
Partly cloudy for most, with isolated showers and storms by the afternoon. The nearby stalled weather maker will likely begin to move offshore by the end of the week, which could increase the threat for severe storms.
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