Baltimore, Maryland – A milder air mass building into the Mid-Atlantic ahead of St. Patrick’s Day will steer much of Maryland toward rain during daylight hours, but nighttime cooling could still allow brief rain-to-snow transitions between March 11 and March 17.
According to the National Weather Service Climate Prediction Center, Maryland remains within a 40-50% probability zone for above-normal precipitation during the 8-14 day period. Temperatures are projected to trend near to slightly above seasonal averages statewide. That warmer pattern favors rainfall for most lower elevations, though marginal overnight readings may still support wet snow in inland and higher terrain communities.
In Baltimore and along the Interstate 95 corridor, daytime highs in the 40s and low 50s could keep most precipitation liquid. However, if steadier precipitation lingers after sunset and temperatures dip into the lower 30s, wet snow could briefly accumulate on grassy areas and untreated secondary roads. Farther west along Interstate 70 into Frederick and Washington counties, slightly cooler surface temperatures may allow more consistent nighttime snow during pre-dawn hours.
Communities in western Maryland, including Hagerstown and areas along Interstate 68, face the greatest chance of measurable accumulation, especially in higher elevations.
Drivers across Maryland should monitor overnight and early morning road conditions where temperatures hover near freezing. Even brief wet snow can create slick spots on bridges and elevated highways. Additional updates are expected as the March 11-17 window approaches and system timing becomes clearer.
