From NWS
1972: Severe thunderstorms struck western and southwestern Iowa for the third consecutive day producing a tornado that damaged farms near Beebeetown, golf ball sized hail around Logan, and winds up to 90 mph that resulted in severe damage at Sac City. The three days of storms from September 10-12 also produced tremendous amounts of rainfall at some locations that led to significant flooding, including at Harlan where the three-day rainfall total was 15.25 inches.

1902: Unusually cold weather brought freezing temperatures across much of the northwestern half of Iowa on September 12-13 with several stations reporting their earliest freeze on record. Low temperatures on the morning of the 12th included 29 F at Carroll, Denison, Fort Dodge, Harlan, and Sibley, 28 F at Atlantic, Le Mars, and Sheldon, and 26 F at Plover.

12 September 1944 → An Air Force plane lost some of the rivets from its wings as it flew into the Great Atlantic Hurricane. The hurricane was a category 5. 12 September 1961 → An F3 tornado spawned by Hurricane Carla destroyed about 20 small homes in Hodge, LA. 5 deaths and 37 injuries were reported with this tornado. 12 September 1961 → Super Typhoon Nancy generated 215 mph surface winds as determined by reconnaissance aircraft. Fortunately the storm was well out to sea 1400 miles south of Tokyo, though it would go on to devastate Japan four days later. 12 September 1979 → Hurricane Frederic, a former Category 4 storm, made landfall at Dauphin Island, AL with 125mph winds. Though damage was widespread, timely evacuations resulted in almost no loss of life. 12 September 1988 → The island of Jamaica was given a devastating hit by Hurricane Gilbert.

Posted under Weather History