Details – An Arctic ridge of high pressure is causing temperatures to fall into the minus thirties over most of Southern Saskatchewan this morning. This in combination, with wind speeds of 15 to 20 km/h, is creating wind chill values of -40 to -50 at numerous locations. These extreme wind chill values are expected to gradually moderate later this morning as temperatures rise. At these extreme wind chill values frostbite on exposed skin may occur in less than 10 minutes.