Snow rollers are like self-made snowballs. Sheila Nemcsok filmed the quirky things in Ottawa, outside Canada's Supreme Court. In a
CBC story, Environment Canada senior climatologist David Phillips notes that now rollers require a temperature roughly 37 to 39 degrees Fahrenheit, wind of about 30 mph, and fresh snow that doesn't stick where it lands.
READ:
Why Snow Is Forming Donut-shape Spirals in Canada
