1883: A large tornado outbreak on record in Illinois affected the northern and central parts of the state. At least 14 strong to violent tornadoes touched down killing 52 people. The largest death toll from a single tornado was 12, with 50 injuries, from an estimated F4 tornado which moved from near Jacksonville to 5 miles west of Petersburg. This tornado destroyed the town of Literberry. Another tornado, with an estimated F4 intensity, killed 11 people and injured 50 along its path from the south edge of Springfield northeast to near Kenney. This particular tornado reportedly drove 10 inches by 12-inch oak timbers 10 feet into the ground. Another estimated F4 tornado in far northern Illinois touched down near Capron and tracked for 17 miles before lifting in far southern Wisconsin. Lastly, an estimated F4 tornado tracked 20 miles through Kenosha and Racine Counties in Wisconsin. Eight people were killed, and 85 were injured.
1980: Mount Saint Helens erupted, spewing ash and smoke sixty-three thousand feet into the air. Heavy ash covered the ground to the immediate northwest, and small particles were carried to the Atlantic coast.
— NWS Seattle (@NWSSeattle) May 18, 2017
— ABC News (@ABC) May 18, 2017