Canada is preparing for a colder and more traditional winter season as weather experts highlight major atmospheric changes. According to seasonal forecasts, a disrupted polar vortex combined with the return of La Niña is expected to shape winter conditions from December through February. These factors will push cold Arctic air into many regions, making early and mid-winter noticeably colder than recent years.
“An exceptionally early disruption of the polar vortex has set the stage for a steady supply of arctic air into southern Canada during December and into January,” said Doug Gillham, senior meteorologist at The Weather Network. “In addition, La Niña has returned. While last winter featured a weak La Niña pattern, a slightly stronger version of La Niña has emerged for the encore performance. This combination should deliver a truly Canadian winter for most of the country.”
Forecasters explain that the early weakening of the polar vortex is encouraging a steady flow of frigid air into southern parts of the country. La Niña, which has strengthened since last year, is also contributing to colder temperatures and more active weather patterns. While the first half of winter is expected to be consistently cold, the second half may bring shifting conditions in some regions.
Across British Columbia, eastern areas are projected to experience colder-than-normal temperatures, while coastal zones should remain closer to seasonal norms. Snowfall is expected to be near normal overall, though the Kootenays and Rockies may see higher totals.
The Prairie provinces are forecast to face one of the coldest winters, with extended periods of severe cold. Snowfall should remain near normal, with occasional blizzard conditions and heavier snow in parts of southern Alberta and southwestern Saskatchewan.
In Ontario and Quebec, winter will begin with colder-than-normal conditions and frequent storms through the holidays. While temperatures may moderate later in the season, an active storm track is likely to maintain near or above-normal precipitation, including snow, ice, and rain events.
Atlantic Canada will see a mix of very cold and milder periods, especially early in the season. Southern Nova Scotia and parts of Newfoundland may trend slightly warmer overall, with near-normal precipitation but fewer heavy snow events due to messy mixed storms.
Northern Canada is expected to experience near-normal temperatures, with Nunavut seeing less severe cold than usual. Snowfall should remain close to normal across much of the region.
Overall, Canadians can expect a winter defined by colder temperatures, active storms, and noticeable regional variation. Make sure you have lots of logs chopped for the wood burner.