1815: The Tambora Volcano in Java began erupting on this day. A few days later on the 10th, Tambora produced the largest eruption known on the planet in the last 10,000 years. Ash from the eruption would circle the globe, blocking sunlight and leading to the unusually cold summer in 1816. On 6/6/1816, snow would fall as far south of Connecticut with some places in New England picking up 10 inches. On July 4th, 1816, the temperature at Savannah GA plunged to 46 degrees. Eastern North America and Europe had freezing nighttime temperatures in August.
Source: Volcano Discovery.
— NWS Little Rock (@NWSLittleRock) April 4, 2017
1936: Approximately 454 people were killed in the second-deadliest tornado outbreak ever in U.S. More than 12 twisters struck Arkansas to South Carolina. An estimated F5 tornado cut a path 400 yards wide through the residential section of Tupelo, Mississippi. At least 216 people were killed, and 700 were injured. The tornado had a 15-mile long path and did $3 million dollars in damage. One of the survivors in Tupelo was a baby of an economically strapped family who had an infant they’d recently named Elvis Aaron Presley. Gainesville, Georgia had at least 203 fatalities and 934 injuries from an estimated F4 tornado that occurred early the following morning.
Source: Monthly Weather Review, May 1936.
1972: An F3 tornado, touched down at a marina on the Oregon side of the Columbia River, and then tore through Vancouver, Washington. The tornado killed six people, injuring 300 others, and causing more than five million dollars damage. It was the deadliest tornado of the year and the worst of record for Washington.