Canada: Adverse winter weather forecast across eastern and southern British Columbia and western Alberta Feb. 29 /update 1

Adverse winter weather is forecast over parts of eastern and southern British Columbia and western Alberta Feb. 29. A winter storm system is expected to bring heavy snow to the region, particularly across higher elevations. Snowfall accumulations of 10-40 cm (4-16 cm) are possible across the affected area. Rainfall and wet snow are possible at lower elevations. Hazardous travel conditions are likely due to slippery roads and reduced visibility. Mountain passes may become blocked due to snowfall accumulations and many areas are on alert due to increased avalanche risk; sections of Highway 1 and the Trans-Canada Highway are closed due to high avalanche risk and avalanche control work.

As of early Feb. 29, Environment Canada has issued the following warnings:

• Red snowfall warnings (the highest level on a three-tier scale): Parts of eastern British Columbia and western Alberta.

• Red winter storm warnings: Parts of eastern and southwestern British Columbia and for several highways across eastern and southern British Columbia.

• Red rainfall warning: Parts of far southeastern British Columbia.

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

Snow accumulations are likely across the parts of the affected area. Lesser snowfall totals 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 likely, especially 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.