A high-pressure system over the mid-Atlantic will bring clear skies with highs around 50 Monday in the Baltimore area as a mild spell arrives, according to the National Weather Service.
Forecasters had expected milder weather to arrive slightly later, with highs in the lower 40s. But by 9 a.m., BWI Marshall Airport had already reached 42 degrees.
A 10-15 mph breeze is expected. A small craft advisory is in effect on the Chesapeake Bay from 1 a.m. to 1 p.m.
Milder weather is moving in for much of the rest of the week, with highs around 50 Tuesday and in the mid-50s by Wednesday. Wednesday's record high for Baltimore is 75 degrees set in 1937.
Highs could remain in the 50s through the weekend, according to the weather service forecast.
Precipitation is unlikely until late Thursday or Friday, and is expected to be in the form of rain, according to the weather service.