1986: Thunderstorms produced 2.53 inches of rain in twenty minutes in downtown Rapid City. The heavy rain caused street and basement flooding. Golf ball size hail fell in Zeona, in Perkins County, which covered the ground.

1778: A hurricane struck Rhode Island, causing extensive damage. It prevented an impending sea battle between the French and British during the Revolutionary War.

2001: Osoyoos, British Columbia reached a record August temperature of 107F.