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Prior to 1950 in the United States, only significant tornadoes are listed for the number of tornadoes in outbreaks. Due to increasing detection, particularly in the U.S., numbers of counted tornadoes have increased markedly in recent decades although the number of actual tornadoes and counted significant tornadoes has not. In older events, the ...
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 ...
The tornado was the first F5 or EF5 tornado in Iowa since one hit Jordan on June 13, 1976, and the second deadliest in Iowa since official record-keeping began in 1950. The deadliest tornado affected the Charles City area on May 15, 1968, and killed 13 while producing F5 damage. [ 12 ]
The weather service's Storm Prediction Center issued a tornado watch for far western Iowa counties around 11:15 a.m. Tuesday. A second watch, issued around 1:15 p.m. covered the rest of the state.
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.
Adjusted annual tornado report count in the United States compared to minimum, maximum, and climatological percentiles. In contrast to the first nine months of 2008, the final quarter was fairly inactive overall, and the inactivity continued into January 2009 with only a few tornadoes in the US the entire month as generally stable air dominated.
NWS meteorologists confirmed more than dozen tornados across Iowa following Tuesday's storms, including an EF2 tornado in southeast Iowa.
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