Article content It was the warmest day of 2021 to date in Southern Alberta Saturday, with sun and a high of 21 C to start off the weekend. That sunny spring weather will quickly turn, however, as Environment Canada has issued a snowfall warning for parts of Alberta near Calgary. We apologize, but this video has failed to load. Try refreshing your browser, or Snowfall warning issued for area around Calgary, on heels of warmest day of the year Back to video The warning, issued around 3:30 p.m. Saturday, forecasts 10 to 15 centimetres of snow in the southern foothills of the Rocky Mountains beginning early Sunday morning.