Canada: Adverse winter weather forecast to continue across parts of southwestern Alberta through at least May 2 /update 1

Adverse winter weather is forecast to continue over parts of southwestern Alberta through at least May 2. Further rounds of heavy snowfall are expected across the affected area May 1-2 before tapering off into flurries by late May 2. Snowfall accumulations of 10-20 cm (4-8 inches) are likely across the region, with higher amounts of 30-50 cm (12-20 inches) possible in the foothills of the Rockies. Hazardous travel conditions are likely across the affected area due to slippery roads and reduced visibility caused by blowing snow. As of May 1, Environment Canada has issued red snowfall warnings (the highest level on a three-tier scale) across the affected area. 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. Blizzard conditions are possible. 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.