Washington, DC – A sharp and sustained cold pattern will settle across the Mid-Atlantic beginning Thursday, April 30, driving temperatures 40% to 60% below normal and immediately impacting commuters along major corridors including I-95, I-66, and I-70 during peak travel windows.
According to the National Weather Service, a large cold air mass sliding southeast from the Great Lakes will anchor over the region through Tuesday, May 6. Daytime highs across Washington, Baltimore, Richmond, and into central Pennsylvania will struggle to reach the low to mid-50s, while overnight lows fall into the upper 30s to low 40s. The pattern reflects a persistent trough over the eastern U.S., keeping colder air locked in place.
Morning commuters in cities including Arlington, Alexandria, Annapolis, and Harrisburg will face the greatest impact, with damp roadways and occasional light rain creating slower travel on key routes like I-95, I-495, and U.S. 50. While precipitation totals remain near normal, intermittent showers could reduce visibility and extend drive times, particularly during early morning hours.
Further south into central Virginia and west toward the Shenandoah Valley, the colder air may briefly approach thresholds for patchy frost in sheltered areas, posing a risk to early-season crops and gardens. Residents should plan for extended heating use, especially during overnight hours when temperatures dip closer to seasonal lows seen in early spring.
Utilities across the region may experience increased demand as homes and businesses rely on heating longer than typical for early May. Winds along the Chesapeake Bay and coastal sections of Maryland and Virginia may add to the chill, occasionally affecting marine travel and smaller vessels.
This colder-than-normal stretch is expected to hold through May 6, with gradual warming possible beyond that period. Additional updates may refine the extent of the cold and any associated travel or infrastructure impacts as the pattern evolves.
