The National Weather Service (NWS) has issued a severe thunderstorm warning from now until 6:30 p.m. for portions of Montgomery County, including Rockville, Gaithersburg, Olney, Aspen Hill, and North Bethesda.
Winds may gust up to 60 mph and may cause trees and large branches to fall. Roads may become blocked by downed trees. Power outages may occur.
Severe Thunderstorm Warning including Columbia MD, Ellicott City MD, Rockville MD until 6:30 PM EDT pic.twitter.com/Abx1dtcdP0
— NWS Baltimore-Washington (@NWS_BaltWash) June 21, 2021