Unseasonably cool air that moved in Sunday dropped much of Maryland close to freezing Monday morning, with highs expected in the 60s in the afternoon.
A frost advisory was in effect for Carroll, Howard, northern Baltimore and Harford counties through 9 a.m. Baltimore-Washington International Thurgood Marshall Airport dropped as low as 35 degrees, the coldest there since April.
Closer to Baltimore and to the Chesapeake Bay, overnight lows were forecast in the upper 30s to lower 40s.
Partly to mostly cloudy skies are forecast throughout the day, with highs in the mid-60s.
Rain showers are possible Tuesday, with morning lows closer to 50 degrees and highs again in the mid-60s.
Another burst of cold air is expected Wednesday, with lows dropping back into the 40s and highs in the mid-50s Wednesday and Thursday.