1Most severe tornado damage; see Fujita scale 2Time from first tornado to last tornado
The May 1957 Central Plains tornado outbreak sequence was a tornado outbreak sequence that took place across the US Central Plains from May 19 to May 21, 1957.[nb 1][nb 2] The most destructive tornado of the outbreak was rated at F5, the highest level, and is often called the Ruskin Heights tornado. The worst of the damage occurred in Ruskin Heights, a suburb and housing development in south Kansas City, Missouri. A total of 57 tornadoes were reported from Colorado to the Mississippi Valley and 59 people were killed during the outbreak, including 44 in the Ruskin Heights tornado.
Wedge tornado produced "near-F5" damage on several farms and was observed with multiple satellite tornadoes. Several different tornadoes may have produced the damage, perhaps a tornado family.[3]
7 deaths - Fremont was devastated, with homes, businesses, and schools destroyed on the east side of town. Damage also occurred on the south side of Van Buren. May have been an F5.[3]
This violent, long-tracked, multiple vortex F5 tornado began near Williamsburg, and moved NE through several counties. Major damage occurred in rural areas near Ottawa and Spring Hill, where homes were completely leveled and several fatalities occurred. The tornado continued into the southern suburbs of Kansas City, tearing through Martin City, Raytown, Hickman Mills, and Ruskin Heights. Entire blocks of homes were completely leveled, many of which were swept cleanly away with debris wind-rowed long distances through nearby fields. Some homes had their anchor-bolted subflooring ripped away, leaving only basements behind. Many businesses including a grocery store, a shopping center, and restaurants were completely destroyed. A few of the businesses at the shopping center sustained F5 damage. Vehicles were thrown through the air and destroyed, and the steel-reinforced Ruskin Heights High School was badly damaged. A canceled check from Hickman Mills was found 165 miles away in Ottumwa, Iowa. This event might have been a tornado family rather than a single tornado, as there was possible break in the damage path south of Wellsville, Kansas. Grazulis rated the tornado an F4, but said probable F5 damage occurred in Ruskin Heights; he subsequently rated the tornado F5.[3][4]
^ abcdefghijklmnopqrstuvwGrazulis, Thomas P (July 1993). Significant Tornadoes 1680-1991. St. Johnsbury, VT: The Tornado Project of Environmental Films. ISBN1-879362-03-1.
^An outbreak is generally defined as a group of at least six tornadoes (the number sometimes varies slightly according to local climatology) with no more than a six-hour gap between individual tornadoes. An outbreak sequence, prior to (after) modern records that began in 1950, is defined as, at most, two (one) consecutive days without at least one significant (F2 or stronger) tornado.[1]