The National Weather Service issued a Tornado Watch until 3:00 a.m. Monday morning.
Shortly thereafter, a Tornado Warning was issued.
...A TORNADO WARNING REMAINS IN EFFECT UNTIL 645 PM EDT FOR CENTRAL CARROLL AND SOUTHEASTERN FREDERICK COUNTIES IN NORTH CENTRAL MARYLAND... At 629 PM EDT, a severe thunderstorm capable of producing a tornado was located over Linganore-Bartonsville, or near Harry Grove Stadium, moving northeast at 45 mph. HAZARD...Tornado. SOURCE...Radar indicated rotation. IMPACT...For those in the direct path of a tornado touchdown, flying debris will be dangerous to those caught without shelter. Damage to roofs, siding, and windows may occur. Mobile homes may be damaged or destroyed. Tree damage is likely. This tornadic thunderstorm will remain over mainly rural areas of central Carroll and southeastern Frederick Counties in north central Maryland, including the following locations... Ijamsville, Linwood, Mount Pleasant, Union Bridge, Monrovia, New Windsor, Marston, Libertytown, Unionville and Buckeystown. PRECAUTIONARY/PREPAREDNESS ACTIONS... TAKE COVER NOW! Move to a basement or an interior room on the lowest floor of a sturdy building. Avoid windows. If you are outdoors, in a mobile home, or in a vehicle, move to the closest substantial shelter and protect yourself from flying debris. Motorists should not take shelter under highway overpasses. If you cannot safely drive away from the tornado, as a last resort, either park your vehicle and stay put, or abandon your vehicle and lie down in a low lying area and protect yourself from flying debris.