Canada: Adverse winter weather forecast parts of southern and western Alberta through at least early Oct. 22

Adverse winter weather is forecast over parts of southern and western Alberta through at least early Oct. 22. The first significant snowfall accumulations of the season are likely Oct. 21, with snowfall tapering off early Oct. 21 in western regions and late Oct. 21-early Oct. 22 in southern regions. Snowfall accumulations of 10-15 cm (4-6 inches) are probable across parts of the region, with higher amounts in excess of 25 cm (10 inches) possible over higher terrain. Hazardous travel conditions are likely across the affected area due to slippery roads and reduced visibility caused by blowing snow. As of early Oct. 21, Environment Canada has issued red snowfall warnings (the highest level on a three-tier scale) across parts of southwestern and western Alberta and s special weather statement for snowfall across the rest of the affected area. Officials could update and extend the coverage of weather alerts over the coming hours.

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 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.