1995: Eight inches to two feet of snow fell in central South Dakota in a two day period from the 17th to the 18th. Many businesses, schools, and roads were closed on the 18th. Hundreds of power poles were downed due to the heavy snow and strong winds in Faulk, Hughes, Sully, Hyde, Hand, Lyman, and Buffalo Counties leaving thousands of people without power. Some significant calf losses also occurred (around 10 to 20 percent in some areas) especially in Hand County. Snowfall amounts included 24.0 inches at Vivian, Ree Heights, and in the Murdo area; 23.0 inches at Kennebec, 18.0 inches at Highmore, 16.0 inches at Blunt, 15.0 inches at Miller and Faulkton, and 8.0 inches at Gettysburg.

1880: Marshfield, MO was devastated by an F4 (estimated) tornado that killed 68 people in the town in just a few minutes, with another 24 dying later of their injuries.

1905: Hail up to one inch in diameter, accompanied by strong winds that blew it into drifts six inches tall, struck Spanish Wells, Bahamas. Hail is exceedingly rare in the Bahamas.

1906: San Francisco was shaken by a severe earthquake. Unusual easterly winds helped to spread the ensuing fires, nearly destroying the city. The Weather Bureau offices at San Francisco and San Jose were demolished.

1949: Tornadoes are extremely rare in Nevada, however on this date a low-end F2 twister struck near Reno. It was on the ground for 12 miles and damaged ranch buildings.

1957: A dust devil in Massachusetts lifted a small child 3 feet into the air and rolled 2 other children on the ground. Fortunately none were hurt. The dust devil was accompanied by a loud whistling sound as it moved westward. It occurred at the beginning of an unusual early season heat wave.