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Tropical air mass brings thunderstorms, high winds, flooding to DC region

Parts of the D.C. region were slammed by heavy rainfall, high winds and hail Thursday as a tropical air mass welcomed in storms.

At one point, the National Weather Service issued a tornado warning for parts of St. Mary’s and Charles counties after a waterspout was spotted offshore near the Wicomico River.

Torrential rain created delays for afternoon commuters with ponding on some roadways and low visibility, WTOP Traffic’s Dave Dildine reported.

Afternoon and early evening thunderstorms dropped buckets of rain on the D.C. area, flooding some spots, and blew through with gusty winds that could knock out power.

“Rainfall rates of two to three inches per hour, so obviously visibilities are low,” WTOP Meteorologist Mike Stinneford reported at 4:30 p.m. “We’re still seeing a lot of heavy storms all the way back into West Virginia, and that’s all got to come through the area.”

Some of the storms carried in hail the size of quarters, according to the National Weather Service.

The D.C. region was under a flood watch from 2 p.m. until 7 p.m. Thursday. The weather service said urban areas along Interstate 95, which have seen heavy rainfall this week, were at the highest risk.

Dildine reported ponding and instances of flooding on major commuter routes, including the Beltway and I-270, during Thursday evening’s commute.

The chance for storms diminished by 7 p.m., when the weather service canceled its severe thunderstorm watch for most of the D.C. area.

“Lingering showers and storms will draw to a close this evening, a little bit of patchy fog overnight,” said 7News First Alert Meteorologist Steve Rudin.



Outside of the storms, Thursday was warm with highs around 85 to 90 and high humidity.

Friday afternoon could bring another round of storms. Periods of sunshine are expected to break through over the weekend.

Forecast

THURSDAY NIGHT:
Becoming partly cloudy. Areas of patchy fog
Lows: 68-75
Winds: West 5 mph

FRIDAY:
Partly cloudy. Scattered showers, storms possible
Highs: near 90
Winds: West 5-10 mph

SATURDAY:
Scattered PM storms
Highs: 78-85
Winds: North 5-10 mph

SUNDAY:
Partly cloudy
Highs: 83-88
Winds: Northeast 5-10 mph

Power Outage Map

 

Current Conditions

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Hot, humid week ahead for DC area with severe storm risk

A dangerous heat wave will grip the D.C. area through Thursday, with highs in the mid to upper 90s and heat index values between 100 and 105. Hot and humid conditions are expected through Thursday, according to the National Weather Service, which said to expect daily thunderstorm chances and a risk of severe thunderstorms. 7News Meteorologist Eileen Whelan told WTOP that most of Tuesday will stay dry, but a few late-day thunderstorms are possible, especially north and east of D.C. as storms drift south from Pennsylvania. Any storm could produce damaging wind gusts and hail, but Whelan reiterated "storm chances are low" on Tuesday. Due to a lack of air conditioning, Parkdale High School in Riverdale, Maryland, closed early at 10:30 a.m. on Tuesday, Prince George's County Public Schools said in a social media post.
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