Thunderstorm Wind in Carroll County, Maryland

Hundreds of trees, branches and wires blew down and snapped around Manchester and Hampstead, including many onto cars and houses. Dozens of roads were blocked by storm debris for several days. Several homes suffered minor roof, shingle and siding damage. Several barns were destroyed. Numerous trees blew down near the intersection of White Oak Court and Ebbvale Road. Power poles blew down into trees near the intersection of Ralph Dell Road and Cape Horn Road.

A strong cold front, driven by an unusually strong upper-level trough and wind shear, interacted with a hot, humid, and unstable airmass over the Mid-Atlantic. This pattern resulted in the formation of lines of thunderstorms and several supercells. The most widespread and significant wind damage was noted over northern Maryland, although pockets of considerable wind damage were noted over portions of northwestern Virginia and eastern West Virginia. Somewhat atypical for the Mid-Atlantic is late summer was the number of large hail reports, with multiple instances of giant hail noted.