1970: Severe thunderstorms produced a few tornadoes and widespread damaging straight-line winds across eastern Iowa. Three tornadoes struck portions of Butler, Floyd, Bremer, and Dubuque counties tracking across rural areas and mostly damaging farm outbuildings. One of the tornadoes moved a pickup truck a hundred yards and destroyed a number of barns in Floyd County. Further southeast winds of 60 to 80 mph produced significant damage and 16 injuries in and around Dubuque.
1912: A year that had begun with one of the coldest and snowiest Iowa winters on record then saw late summer heat persist well into September. The heat wave peaked on the 8th with a high temperature of 104 F at Ottumwa and continued on the 9th before milder air finally moved in on the 10th. Several stations across Iowa registered their latest triple digit heat on record on the 9th, including Burlington with a high of 100 F. Readings of 100 F were also reported at Albia and Bloomfield and the temperature reached 101 F at Allerton, Centerville, and Corydon. Incredibly, a series of ensuing cold fronts during the following week brought temperatures down into the 40s and even upper 30s by September 17th when Storm Lake reported a trace of snow, making it one of the earliest observances of snow on record in Iowa.
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This post was written by Schnack on September 9, 2012