The National Weather Service is warning of the potential for icy roads Saturday morning.
Rain falling on sub-freezing pavement — the raindrops are expected to start falling around 8-9 a.m. — may turn to ice and make driving hazardous.
More from an NWS Special Weather Statement:
…POTENTIAL FOR PATCHY ICY CONDITIONS EARLY SATURDAY MORNING ALONG AND WEST OF INTERSTATE 95 IN THE BALTIMORE METROPOLITAN AREA AND NEAR INTERSTATE 95 AROUND WASHINGTON DC AND SPOTSYLVANIA COUNTY IN VIRGINIA… RAINFALL IS EXPECTED TO START AROUND DAYBREAK SATURDAY MORNING IN THE GREATER BALTIMORE/WASHINGTON VICINITY. THE RECENT COLD SNAP HAS CAUSED ELEVATED ROADWAYS, BRIDGES, AND OVERPASSES TO BE AT OR BELOW FREEZING FOR AN EXTENDED PERIOD OF TIME. DESPITE FORECAST AIR TEMPERATURES BEING ABOVE FREEZING EARLY ON SATURDAY MORNING IN DOWNTOWN BALTIMORE AND WASHINGTON, THERE MAY BE RESIDUAL AREAS AT GROUND LEVEL WHICH WILL CONTINUE TO BE BELOW FREEZING. THIS WILL CREATE THE POTENTIAL FOR PATCHY AREAS OF ICE TO ACCUMULATE BETWEEN DAWN AND 10 AM ON SATURDAY MORNING. THE GREATEST POTENTIAL FOR THIS PATCHY ICE WILL BE IN THE NORTHWEST SUBURBS OF BALTIMORE, NEAR WASHINGTON DC AND SPOTSYLVANIA COUNTY IN VIRGINIA. PLEASE CHECK BACK OVERNIGHT FOR UPDATED FORECASTS, INCLUDING THE POTENTIAL EXPANSION OF WINTER WEATHER ADVISORIES FURTHER EAST INTO MAJOR METROPOLITAN AREAS.