Tom's Thumb: 2019
"It snowed in the higher elevations of the Phoenix metro area, including north Scottsdale and Cave Creek, on Feb. 21 and 22. According to the National Weather Service, the Phoenix area hadn't seen snow since 2015."
Credit: Johnson, Weldon. "Phoenix's biggest weather events of 2019 didn't involve heat. Here's what they were". AZ Central. Jan. 2, 2020.