Red River Valley tornado outbreak: A tornado lands in Wichita Falls, Texas killing 42 people.
The 1979 Red River Valley tornado outbreak was a tornado event that occurred on April 10, 1979, near the Red River Valley. It is noted for the F4 tornado that hit Wichita Falls, Texas, and is commonly referred to as "Terrible Tuesday" by many meteorologists. Additional tornadoes were reported across the Southern Plains as well as in the Mississippi River Valley on April 10–11, 1979.