Canada: Adverse winter weather forecast across southwestern regions through at least Dec. 14

Adverse winter weather is forecast over parts of southwestern Canada through at least Dec. 14. Heavy snow will move across northern Alberta early Dec. 14 and east-central British Columbia late Dec. 13, with total amounts of 10-20 cm (4-8 inches) expected. The snow will begin to taper off late Dec. 14. Hazardous travel conditions are likely across the affected region due to slippery roads and reduced visibility caused by blowing snow.

As of late Dec. 13, Environment Canada has issued the following warnings:

• Red snowfall warnings (the highest level on a three-tier scale): Northwestern Alberta and Williston and Pine Pass in British Columbia.

• Red wind warnings: Greater Victoria, Howe Sound, Metro Vancouver, most of Vancouver Island, Southern Gulf Islands, and Sunshine Coast in southwestern British Columbia.

• Red coastal flooding warnings: West Vancouver Island from East Sooke to Cape Scott due to high storm surge, large waves, and higher-than-normal water levels near high tide midday Dec. 14. Storm surge may rise to 100 cm (40 inches) above the highest astronomical tide.

• Red rain warnings: East Vancouver Island from Courtenay to Campbell River.

Officials could update and extend the coverage of weather alerts over the coming hours.

Lesser snow accumulations are possible where sleet and freezing rain mix with snow. In addition to the heavy snow, strong wind gusts could lead to periods of blowing and drifting snow. Sporadic power outages may occur throughout the affected area.

The inclement weather will likely cause widespread ground and air transport disruptions across the affected areas. Traffic and commercial trucking delays are probable 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. Gusty winds will threaten to topple high-profile vehicles throughout the affected areas. As a precaution, mountain passes and tunnels will likely be closed during periods of intense snowfall. The disruptive weather will probably 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.