Copyright AccuWeather, Inc. 2018 All Rights Reserved APRIL 20 PLACE YEAR EVENT ___________________________________________________________________________ Morgan City, La. 1952 Two tankers crash in dense fog. The ships explode and only 5 people survive. Hiawatha, Kan. 1964 One of two severe hailstorms in the same week. Hail up to 2.5 inches in diameter accumulated 6 inches deep in one storm.