What caused the super tornado outbreak of 1925?

The super tornado outbreak of 1925, also known as the Tri-State Tornado, was primarily caused by a unique combination of meteorological conditions. A strong cold front collided with warm, moist air from the Gulf of Mexico, creating instability in the atmosphere. This severe weather setup led to the formation of multiple tornadoes across several states, including Missouri, Illinois, and Indiana, resulting in unprecedented destruction and loss of life. The outbreak is notable for producing one of the longest and deadliest tornado tracks in recorded history.