1780: The infamous “dark day” in New England tradition. At noon, it was nearly as dark as night. Chickens went to roost, and many persons were fearful of divine wrath. The “dark day” was caused by forest fires to the west of New England.
The image above is courtesy of the International Journal of Wildland Fire published in 2007. “Fire dates based on tree rings and fire scars indicate that fires occurred in 1780 at several locations, including the Algonquin Highlands of southern Ontario, western Maryland, western Virginia, the Missouri Ozark Highlands, the Boston Mountains of Arkansas, and the Boundary Waters Canoe Area of northern Minnesota.”
1915: A spring storm came to an end after producing widespread snow. Total snowfall from the storm included: 17.6 inches in Scottsbluff, Nebraska, 8 inches at Cheyenne, Wyoming, 7 inches at Chadron and 3.9 inches in North Platte, Nebraska.
— NWS Little Rock (@NWSLittleRock) May 21, 2017
2017: Heavy snowfall occurred on May 18-19th in Wyoming.
— NWS Cheyenne (@NWSCheyenne) May 20, 2017
2017: A waterspout was observed by Lavagna, Italy.
— #eustorm (@EUStormMap) May 20, 2017