Culture, Vol. I, ed. Charles Reagan Wilson and William Ferris (New York: Anchor Books, 1989). External links National Oceanic and Atmospheric Administration (n.d.) Omaha's Terrible Evening. Tragic Story of America's Greatest Disaster. F4 tornadoes by date ,1913-03-21 Tornadoes of 1913 Tornadoes in Nebraska Natural disasters in Omaha, Nebraska North Omaha, Nebraska Omaha Easter Sunday tornado 1913 natural disasters in the United States March 1913 events in the United States