1983: During the early afternoon hours, a strong microburst swept across Andrews Air Force Base in Washington, D.C. Although the base anemometer was not calibrated at extreme wind speeds, the peak gust hit 149 mph. It was reported that Air Force One, with President Reagan on board, landed 6 minutes before the peak gust.
Source: Capital Weather Gang
1985: A devastating flash flood and hailstorm struck Cheyenne, Wyoming during the evening of August 1st, 1985. Twelve people lost their lives and damage was estimated to be in excess of $65 million. The NWS Office in Cheyenne measured 6.06 inches in 24 hours. Hail, up to 2 inches in diameter pummeled parts of the city, reaching depths of nearly a foot deep.
— NWS MBRFC (@NWSMBRFC) August 1, 2017
— NOAA Satellites (@NOAASatellites) August 1, 2017
— Randy Bresnik (@AstroKomrade) August 1, 2017