Spontaneous snowballs in Idaho formed by rare weather event WLS-TV This Jan. 30, 2016 photo shows a rare weather event that caused the spontaneous snowballs near the tiny town of Picabo, Idaho. (Sunny Healey/The Nature Conservancy via AP). AP. Wednesday, February 10, 2016 08:49PM. BOISE, Idaho –. Thousands of … Rare weather event produces spontaneous snowballs in IdahoChicago Tribune |