Canada: Adverse winter weather forecast across parts of Alberta, British Columbia, and Saskatchewan through at least Nov. 24 /update 3

Adverse winter weather is forecast over parts of west-central Canada through at least Nov. 24. A developing low-pressure system over Montana in the US is expected to spread heavy snowfall across the region from late Nov. 22 through Nov. 23, before tapering off Nov. 24. As of Nov. 22, Environment Canada has issued red snowfall warnings (the highest level on a three-tier scale) across parts of central and southern Alberta, far eastern and far southeastern British Columbia, and southern Saskatchewan. Snowfall accumulations of 10-35 cm (4-14 inches) are forecast across the affected area. Hazardous travel conditions are likely across the affected area due to slippery roads and reduced visibility caused by blowing snow. Officials could update and extend the coverage of weather alerts over the coming hours and days.

In addition to the wintry precipitation, strong wind gusts could lead to periods of blowing and drifting snow. Sporadic power outages are likely throughout the affected area.

The inclement weather will likely cause ground and air transport disruptions across the affected areas. Traffic and commercial trucking delays are possible along regional highways. Dangerous and challenging driving conditions are especially likely on secondary and rural roads as maintenance crews prioritize clearing major routes. Authorities will probably close stretches of highways if driving conditions become too hazardous. As a precaution, mountain passes and tunnels may be closed during periods of intense snowfall. The disruptive weather may cause delays and cancellations at airports in the affected regions. Heavy, wet snow and strong winds could bring down power lines and trees with foliage.