Baltimore, Maryland — A late-season cold surge will move into Maryland early Friday, May 8, bringing near-freezing overnight temperatures, gusty winds, and periods of rain that could disrupt travel and outdoor activity across Baltimore, Frederick, Annapolis, Hagerstown, and Salisbury.
According to NOAA’s Climate Prediction Center, temperatures will run 50–60% below normal through May 14, with the coldest air settling in Friday night. The most critical window is from 2 a.m. to 8 a.m. Saturday, when temperatures are expected to drop into the low 30s across inland areas and the mid-30s closer to the Chesapeake Bay.
That cold will create immediate impacts. Frost could form on bridges and overpasses along I-70, I-83, and I-95, increasing the risk of slick spots during the early morning commute. Inland locations such as Frederick and Hagerstown may see colder pockets where freezing conditions linger longer, raising the risk of plant damage and exposing early-shift workers to near-freezing air.
Rain moving in Friday night will reduce visibility and create pooling on roadways. Low-lying streets near the Inner Harbor in Baltimore, along with flood-prone underpasses and drainage areas near the Potomac River, could see water buildup within minutes during heavier showers.
Winds will strengthen Saturday into Sunday, with gusts reaching 30 to 35 mph. Those winds may knock down small branches and lead to isolated power outages, especially in wooded and suburban areas.
Drivers should slow down on wet roads, particularly before sunrise when frost may develop, and avoid water-covered roadways. Residents should cover sensitive plants and secure outdoor items ahead of the wind.
The highest risk for freezing temperatures and travel disruptions peaks early Saturday between 2 a.m. and 8 a.m.
