DC, Maryland, Virginia weather: Severe thunderstorms slam region

Tree down in Bethesda after strong storms roll through
A large tree was brought down in Bethesda after strong storms rolled through the area. It's now blocking the roadway.
ST. MARY'S COUNTY, Md. - Severe storms swept through D.C., Maryland and Virginia Tuesday evening.
A severe thunderstorm watch was in effect until 9 p.m. for D.C., Maryland and northern Virginia. The main hazard was damaging wind.
A tornado warning was also issued for parts of St. Mary's County and Calvert County in Maryland. Residents were advised to seek shelter for the duration of the warning, which remained in place until 8:15 p.m.
What we know:
According to the National Weather Service, scattered strong to severe storms, excessive rainfall, and flooding are expected across parts of the Mid-Atlantic into the Northeast throughout Tuesday.
The region remains under a slight risk for severe weather with multiple rounds of storms possible through the evening, with some producing downpours, damaging wind gusts and lightning.
The National Weather Service says flash flooding is possible in low-lying and flood-prone areas.

Severe thunderstorms threaten DC region Tuesday
Take precautions:
NWS issued reminders for those in the path of the storms.
They say a severe thunderstorm watch means conditions are favorable for severe thunderstorms in and close to the watch area.
Persons in these areas should be on the lookout for threatening weather conditions and listen for later statements and possible warnings.
Severe thunderstorms can and occasionally do produce tornadoes.