Portal:Weather/On this day list/April 21
April 21[edit]
1965: A devastating tornado outbreak killed 58 people near Chicago.
1997: The 1997 Red River Flood peaked in Grand Forks, North Dakota, when the Red River crested at 54.35 feet (16.6 m). Dikes were only built to 49 feet or lower, so catastrophic flooding resulted.
2003: Tropical Storm Ana transformed from a subtropical cyclone to a tropical cyclone, becoming the only such storm ever recorded in the northern Atlantic Ocean in April.