An intermittent rain was expected to wash away by tonight some of the snowfall that accumulated about 2 inches in Baltimore and up to 4 to 5 inches in the Westminster and Frederick areas, the National Weather Service said.
But the snow, before it vanished, caused clogged interstates and secondary roads during the morning rush hour and forced the cancellation of classes in 17 public school systems and area colleges.
The National Weather Service said the snow tapered off late in the morning and changed to intermittent rain. The rain was expected to continue through Saturday afternoon.
"We had a lot of frustrated drivers out there," said Sgt. James Huber at the State Police headquarters in Pikesville. He said motorists wisely slowed down on the slick road surfaces and reduced the number of fender-bender accidents.
A Baltimore County police spokesman said drivers were traveling at 30 mph on the Beltway at the height of the storm.
Officials closed public schools in Baltimore, Anne Arundel, Harford, Howard, Carroll, Frederick, Cecil, St. Mary's, Washington, Queen Anne's, Talbot, Calvert, Kent, Montgomery, Caroline, Charles and Prince George's counties.
The colleges and community colleges that closed included Anne Arundel, Dundalk, Carroll, Catonsville, Essex and Howard community colleges and Villa Julie and Hood colleges.
Also, officials at Laurel Race Course canceled today's card.
Forecaster Bill Miller said the ground is saturated by the melting snow of previous storms this week, and he warned of possible minor flooding of small streams and in poor drainage areas tomorrow.