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Tornado outbreak of June 27, 1953; May 1960 tornado outbreak sequence; Tornado outbreak sequence of April 23–30, 1961; Tornado outbreak sequence of May 14–31, 1962; Tornado outbreak sequence of June 1966; 1967 St. Louis tornado outbreak; Tornado outbreak of April 30 – May 2, 1967; 1968 Hansell-Charles City tornado; 1968 Oelwein tornado
2009: 1,147 0 695 348 82 20 2 0 2010: 1,282 0 768 342 127 32 13 0 2011: 1,713 0 802 629 198 61 17 6 2012: 948 0 583 241 94 26 4 0 2013: 916 0 499 309 80 19 8 1 2014: 929 0 510 321 71 20 7 0 2015: 1,178 0 691 401 65 18 3 0 2016: 974 30 530 311 75 26 2 0 2017: 1,418 67 615 594 127 13 2 0 2018: 1,121 15 619 400 75 12 0 0 2019: 1,529 179 655 540 ...
This page documents confirmed tornadoes in October, November, and December 2020 via various weather forecast offices of the National Weather Service.Based on the 1991–2010 averaging period, 61 tornadoes occur across the United States throughout October, 58 through November, and 24 through December.
The only confirmed tornado so far in Polk County was in Pleasant Hill, A tornado touched down in the Des Moines suburb on Friday at 8:50 p.m., lasting until 9:02 p.m.
The 49 tornadoes in both May and April are tied for the third most tornadoes in a single month in Iowa's history. December 2021 produced 63 tornadoes, which is the Iowa single-month record.
Sixty-three tornadoes ripped through Iowa on Dec. 15, 2021 − the single biggest day of confirmed tornadoes in state history. That was an unusual weather pattern, Schoor said.
Since its initial usage in May 1999, the National Weather Service (NWS) in the United States has used the tornado emergency bulletin — a high-end classification of tornado warning — sent through either the issuance of a warning or via a "severe weather statement" that provides updated information on an ongoing warning—that is issued when a violent tornado (confirmed by radar or ground ...
Several major roads in Iowa City were closed due to storm debris, including Interstate 380 between Iowa City and Cedar Rapids. [64] Four state parks were closed through the end of August for cleanup; [ 65 ] as of December 2020, [update] all had reopened except Palisades-Kepler State Park, which was closed indefinitely due to storm damage until ...