April 23
- 1968 – A tornado outbreak hit the Ohio and lower Mississippi valleys. An F5 tornado devastated Wheelersburg and Gallipolis, Ohio, killing seven people and injuring more than 100. Its F5 status is disputed. An long-track F4 tornado (possibly F5) killed six people and injured more than 360 as it struck numerous towns in Ohio and Kentucky, most notably Falmouth, Kentucky, where four were killed and 350 were injured. One other person was killed by an F4 tornado near Newtonsville, Ohio.