The Cumberland and Cumberland River basin experienced a 36-hour rainfall that produced flooding in Nashville and its greater area (After Action Report, II). The two-day storm of 2010 was believed to be larger than a 100-year event. Storm activity began on May 1 and 2 and created large-scale flash flooding along the Cumberland and Lower Tennessee Rivers and within its tributaries. The Cumberland River basin has historically received large amounts of precipitation and has previously experienced extreme precipitation, making it prone to severe flooding (After Action Report, I). Some of the historic floods that have affected the Cumberland River are those of December 1926, January 1927, January 1937, and March 1975, which produced maximum flood heights across much of the river. Prior to the May 2010 flood, the Cumberland River had reached a flood stage of 45.26 feet during the May 1987 flood, following a series of flood events that occurred over an extended period of time (After Action Report , 4). The 2010 flood that affected much of Nashville behaved more like a flash flood, producing record rainfall for much of the area. According to the Quantitative Precipitation Forecast (QPF), precipitation amounted to 7.8 inches in Central Tennessee on April 30. The report also states that widespread rainfall amounting to 2-6 inches in total occurred across the southeastern United States extending into Illinois, Indiana and Ohio. Precipitation for parts of West Tennessee and Kentucky totaled 3-4 inches with a high of 4.65 inches (After Action Report, III). As stated in the report, areas around Nashville received more than 13 inches of rain in a 36-hour span, which doubled the record set by the September 1979 flood. United States extends to Illinois, Indiana and Ohio. The flood caused material damage that exceeded 2 billion dollars and a total of 37 people died, despite numerous warnings received. This epic event was billed as the 100-year flood that western and central Tennessee had expected since the last widespread flood. The Cumberland River, a major waterway that runs through north-central Tennessee, accumulated so much rain that it caused a crest in Nashville to rise to 51.86 feet, 12 feet above flood stage. The heaviest rainfall occurred in Davison, Williamson, Dickson, Hickman, Benton, Perry and Humphrey counties, resulting in an average of 14 to 15 inches of rain, equivalent to 420 billion gallons of water in just two days. The epic flood of 2010 in Nashville broke the rainfall record set 1979.
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