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

Adverse winter weather conditions are forecast across parts of southeastern Canada and the northeastern US through at least Nov. 29. A storm is forecast to push into the Northeast Nov. 28, spreading scattered showers and thunderstorms into the East Coast late Nov. 27 as well as a swath of moderate to heavy snowfall across portions of the interior Northeast. The combination of heavy snowfall and gusty winds may cause blizzard conditions in places. Hazardous driving conditions are likely across the affected areas due to icy roads and reduced visibility caused by blowing snow.

As of late Nov. 27, the US National Weather Service (NWS) has issued winter storm warnings for most of Maine, central New Hampshire, northeastern New York, and southern and central Vermont. Lake effect snow warnings have been issued for western New York and far northeastern Ohio. Winter weather advisories are in place across most of the rest of the affected area.

Environment Canada has issued grey special weather statements (the lowest level on a three-tier scale) across southern and central New Brunswick and Prince Edward Island as well as Cumberland, Inverness, and Victoria counties in Nova Scotia through early Nov. 29. Snowfall amounts possibly reaching 15 cm (6 inches) are likely over southern and central New Brunswick and possibly exceeding 10 cm (4 inches) are likely over the rest of the affected area in Canada. 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. 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.