May 27
- 1896 – An F4 tornado devastated portions of St. Louis, Missouri and East St. Louis, Illinois, killing at least 255 people, the third-highest death toll of any U.S. tornado. The deaths of some victims may not have been recorded as their bodies were washed down the Mississippi River. Other tornadoes on this day killed a total of 50 people.
- 1997 – A slow-moving F5 tornado obliterated the Double Creek Estates subdivision in Jarrell, Texas, killing 27 people. The event is notable for the extreme damage it inflicted: homes were swept away with debris reduced to small pieces, 525 ft (160 m) sections of asphalt were peeled from roads, and up to 18 in (46 cm) of soil was removed in places.