Canada, US: Adverse winter weather conditions forecast across parts of southeastern Canada and the northeastern US through early Nov. 29

Adverse winter weather conditions are forecast across parts of far southeastern Canada and the northeastern US through at least early Nov. 29. A low-pressure system is expected to generate lake-effect snow around the Great Lakes, with snowfall accumulations of up to 60 cm (24 inches) possible in areas downwind of the lakes. A storm system is also forecast to bring strong winds and possible storm surge in Atlantic Canada. Hazardous driving conditions are likely across the affected areas due to icy roads and reduced visibility caused by blowing snow.

As of early Nov. 27, Environment Canada has issued red snowfall and snow squall warnings across parts of northwestern New Brunswick, southern Ontario, and southern Quebec. Red strong wind warnings are in place for parts of southeastern Labrador, eastern, northern, and western Newfoundland, eastern Nova Scotia, and southeastern Quebec. Storm surge warnings have been issued for parts of northeastern New Brunswick and southeastern Quebec. Snowsquall watches are in place for parts of the Ontario Peninsula and special weather statements for winter weather have also been issued for parts of southern Ontario.

The US National Weather Service (NWS) has issued winter storm warnings for parts of the Upper Peninsula of Michigan and lake-effect snow warnings for parts of northeastern Ohio and northern and western Upstate New York. Winter weather advisories are in place for parts of northern Michigan, far northern Wisconsin, northeastern Ohio, northwestern Pennsylvania. northern New York, northern Vermont, northern New Hampshire, and northern and western Maine.

Officials will likely issue new alerts or update/rescind existing advisories as weather conditions change over the coming days.

Snow accumulations are likely across 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 also likely on secondary and rural roads as maintenance crews prioritize clearing major routes. Authorities will likely close stretches of highways if driving conditions become too hazardous. Gusty winds will threaten to topple high-profile vehicles throughout the affected areas. Mountain passes and tunnels will probably be closed as a precautionary measure during periods of intense snowfall. The disruptive weather will likely 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.