Special weather statement issued for Calgary, 15 to 25 cm of snow expected

Weather conditions in Calgary are expected to deteriorate rapidly starting Tuesday as a shift in the weather pattern brings Arctic air across the western Prairies. This cold air will meet with a moist, Pacific air mass producing a classic spring scenario with heavy wet snow expected across the region. Further complicating matters, the base of this trough (counter-clockwise rotation around a low pressure system) will sit along the southern edge of Alberta creating up sloping conditions. Normally,