From NWS
1994: Severe thunderstorms struck far northeastern Iowa producing multiple tornadoes and very strong straight-line winds with damage reported across portions of Fayette, Howard, and Winneshiek counties. The strongest tornado produced F3 damage along a path from near Schley in Howard County to several miles north of Decorah. Just to the north of this track very strong straight line-winds produced a gust to 98 mph at Cresco where this was one of the worst storms on record. Numerous farm buildings were flattened and many trees and power lines were blown down.

1990: Several rounds of strong to severe thunderstorms pounded northwestern Iowa from the evening of July 18 into the morning of July 19. At Sioux City golf ball sized hail was followed later by heavy rain with 3.60 inches falling in just one hour, causing major urban flooding and a record crest on Perry Creek which led to the evacuation of about a thousand homes. More than 500 homes sustained damage along with nearly a hundred businesses, and one house basement collapsed. Elsewhere heavy rain also produced flash flooding in Crawford and Plymouth counties. Near Denison 3.50 inches of rain fell in just over an hour and on one farm about 100 hogs were killed as 8 to 10 feet of water flooded a barn.

1904: Thunderstorms produced very heavy rain and flooding across portions of central Iowa. At Waukee 6.80 inches of rain fell in just 10 hours, more than they had received in all of May and June combined. At Des Moines 4.32 inches was recorded while Stuart received 5.60 inches and De Soto 7.73 inches.

19 July 1977 → Thunderstorms produced torrential rains over parts of southwestern Pennsylvania. Some places received more than 12 inches in a 7 hour period. Johnstown flooded with up to 10 feet of water. The flooding in Johnstown resulted in 76 deaths. This was the second major Johnstown flood, with the first occurring in 1889. 19 July 1986 → The 115th British Open at Turnberry was the site of some truly terrible weather. During the 3rd round, only one player broke par 70 with a day of strong winds and pelting rain off of the Irish Sea. The weather finally cleared on Sunday with Greg Norman winning by 5 shots.

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