Canada, US: Adverse winter weather forecast across parts of west-central Canada and the far northern US through at least Nov. 22 /update 1

Adverse winter weather is forecast over parts of west-central Canada and the far northern US through at least Nov. 22. Moderately-to-locally heavy snowfall is expected across the region over the coming days, as well as strong winds across the affected area and some freezing rain and rainfall in places. Snowfall accumulations of up to 50 cm (20 inches) are possible in parts of the affected area, with widespread accumulations of 5-20 cm (2-8 inches) likely across the region. Hazardous travel conditions are likely across the affected area due to slippery roads and reduced visibility caused by blowing snow.

As of early Nov. 19, Environment Canada has issued red snowfall warnings (the highest level on a three-tier scale) across much of eastern and southeastern and parts of central Saskatchewan and parts of central Manitoba. Winter storm warnings are in place for parts of northwestern, southwestern, and western Manitoba and yellow winter storm watches and special weather statements for parts of southern Manitoba.

The US National Weather Service (NWS) has issued winter storm warnings across parts of northern North Dakota and winter weather advisories across parts of north-central and northwestern North Dakota and far northeastern Montana.

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.