Between April 23–30, 1961, a tornado outbreak sequence struck the Midwest, Ohio, and Mississippi Valleys, and the Eastern United States. Large hailstorms accompanied the tornadoes as well and numerous other weather events also occurred. Three people were killed, 38 others were injured and losses totaled $26.810 million (1961 USD). Two additional fatalities also occurred due to flooding and lightning. Meteorological synopsis A series of at least two or three disturbances moved over the US over the timespan of nine days, starting with a strong weather system that came out of the Rocky Mountains on April 22. On April 23, multiple cells impacted the Midwest, with several strong, long-tracked tornadoes being reported, producing several casualties. On April 24, multiple clusters of severe thunderstorms formed over Oklahoma as well as South-Central and Southeastern Kansas. These storms produced multiple reports of wind and hail damage, power outages, funnel clouds, and a tornado. The storms congealed into a squall line that produced additional severe weather and tornadoes along with flash flooding through Missouri into West Virginia overnight into April 25. Following the squall line, a massive cluster of severe and tornadic thunderstorms with torrential downpours formed over Indiana and Tennessee and trekked eastward, producing massive amounts of damage and numerous casualties. General thunderstorms produced scattered activity during April 26-29 before another outbreak surged through the Great Plains on April 30, the final day of the sequence. Confirmed tornadoes April 23 event April 24 event April 25 event April 26 event April 27 event April 28 event April 29 event April 30 event Southern Marshalltown–Vinton–Center Point–Monticello, Iowa This large, strong, long-tracked F3 tornado–which was most likely a tornado family–first touched down in Southern Marshalltown and immediately became strong, damaging numerous structures. The damage to the town alone was estimated at $1 million and eyewitnesses reported that tornado had more than one funnel as it passed through town. From there the tornado moved generally eastward at up to on a discontinuous path that may have included more than one tornado. It first passed south of Garwin before crossing the Hinkle Creek directly into Garrison. It then struck the south side of Vinton before moving directly through Center Point and Alice. After crossing the Wapsipinicon River and striking the north side of Central City, it crossed Buffalo Creek, striking areas south of Prairiesburg. It was observed with a double funnel again as it passed by Monticello, one