Storms may develop or expand somewhat north this evening and could produce heavy rain, before exiting to the east by 10 or 11 p.m. Particularly in our eastern areas, storms could linger after sunset. Although heavy rain and lightning will be the primary hazards with these storms, damaging wind gusts that bring down trees are possible in a few storms. Wind shear promotes larger, longer-lived complexes of thunderstorms, allowing storm cells to intensify. That will be sufficient to help organize small storm cells into larger clusters and small lines.

Source: Washington Post July 28, 2020 17:06 UTC