The 1937 flood was by far the deepest on record in Louisville, followed by 1945, 1884, 1964, 1883, 1913, 1997, 1907, 1948 and 1933.
Flooding History in Louisville | MSD
Average rainfall in Kentucky during January 1937 was 12 inches.
Several locations in Kentucky received 21 inches of rain during January, 1937.
January 1950 also brought very heavy rain.