Thunderstorm Warnings, Flash Flood Watch in DC Area: Heavy Rain, Strong Winds Expected

by 24USATVJuly 18, 2021, 8 a.m. 20
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A flash flood watch and severe thunderstorm watch are in effect for the Washington, D.C., area until late Saturday as the region grapples with both dangerous heat and downpours and strong winds.

A severe thunderstorm watch is in effect for the entire D.C. area until 11 p.m. Damaging winds are the main risk and these storms could spin off tornadoes, the National Weather Service says.

Multiple rounds of strong storms are likely in the region between 1 p.m. and 9 p.m. Expect lightning strikes and downpours that could set off flash floods.

A flash flood watch is in effect until 11 p.m. for areas including D.C., Anne Arundel, Prince George's and parts of Montgomery County in Maryland, plus Arlington, Falls Church, Alexandria and Fairfax in Virginia.

Power outages were reported across the region. The worst of these were reported by 1,374 Pepco customers in Maryland as of 8:31 p.m.

Temperatures are set to rise into the mid-90s and with oppressive humidity, the heat index could reach 100° to 107°, Storm Team4 says.

A heat advisory is in effect for D.C. and Calvert, Charles, Prince George's and St. Mary's counties until 8 p.m.

Given the heat and humidity, storms could be severe and have the potential to dump 1 to 2 inches of rain per hour, the National Weather Service says.

There could be a few lingering showers and storms, especially east, through the late evening but the region will mostly dry out overnight.

Sunday is set to be less humid with cooler temperatures topping out in the mid-80s.

A few isolated storms are possible Sunday afternoon, but mostly south of the D.C. area.

On Monday, expect mostly sunny skies, temps in the mid-80s and the chance for isolated afternoon storms.

Tuesday won’t be as humid, but temperatures will be in the 90s.

When the temperature or heat index in the District is forecast to reach 95 degrees or higher, the District activates cooling centers for residents.

Go here to find a cooling center near you.
• Stay inside when possible, or find places in the shade or with air conditioning.
• Check in on your neighbors. Young children, seniors, and those with access and functional needs are the most vulnerable.
• Drink plenty of fluids, but don’t drink liquids that contain alcohol, caffeine or large amounts of sugar.
• Keep pets inside. Walk pets early in the morning, give them plenty of water and don't leave them in vehicles, which can reach dangerous temperatures within 10 minutes. For all animal emergencies, including animals left outside in extreme temperatures or in vehicles, call the Humane Rescue Alliance at (202) 723-5730.
• Wear appropriate clothing and sunscreen. Pick lightweight, loose fitting, light-colored clothing and wide brimmed hats. Use a sunscreen of SPF 15 or higher.

Stay with Storm Team4 for the latest forecast.

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