Severe storms today will be likeliest closer to the Maryland-Pennsylvania border, but remnants could impact the D.C. region, especially this evening. The combination of buoyant air, wind shear, and the approach of a frontal boundary sets the stage for potentially severe weather. (Pivotal Weather)In summary, we believe the main convective threat will stay north of the D.C. region this afternoon. The approximate likelihood of storms decreases from 60 percent across northern Maryland, down to 50 percent in the immediate D.C. region and 40 percent farther south. Area under severe thunderstorm watch through 11 p.m. (National Weather Service)Some storms are starting to fire off in eastern Ohio and southwest Pennsylvania.

Source: Washington Post May 12, 2018 15:48 UTC