Why did the palm Sunday tornadoes happen?

The Palm Sunday tornadoes of April 11, 1965, occurred due to a combination of meteorological factors, including a strong cold front colliding with warm, moist air from the Gulf of Mexico. This created severe thunderstorms capable of producing tornadoes. Additionally, the atmospheric conditions were highly unstable, with significant wind shear that facilitated the development of rotating supercell storms. These factors together led to one of the most devastating tornado outbreaks in U.S. history.