The plans are in effect for Allegany, Baltimore, Calvert, Caroline, Carroll, Cecil, Charles, Dorchester, Frederick, Garrett, Harford, Howard, Kent, Queen Anne's, St. Mary's, Talbot and Washington counties.
When snow emergency plans are in effect Maryland law requires motorists to operate vehicles that are equipped with snow tires to do so as designated by the manufacturer or equipped with chains.
During the declaration of a snow emergency, a person may not park a vehicle on any highway designated as a snow emergency route. Violators will be towed.
Click here to follow Daily Voice Gaithersburg and receive free news updates.