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Understanding the impact of La Nina
As winter approaches, Canadians are buzzing with anticipation about what the season will bring. This year, the weather patterns are heavily influenced by La Nina, a phenomenon characterized by cooler ocean temperatures in the Pacific.
According to Global News chief meteorologist Anthony Farnell, La Nina typically leads to lower temperatures and increased precipitation across Canada, contrasting sharply with last year’s El Nino conditions that brought warmer weather nationwide.
However, Farnell warns that La Nina’s effects may not be as pronounced as expected.
“La Nina hasn’t fully materialized and there are signs that it may never come,” he stated. Despite this uncertainty, even neutral conditions in the Pacific can usher in colder air, which generally translates to more snow for many regions.
Regional temperature variations
In terms of temperature, Canadians can expect a mixed bag this winter. Areas like British Columbia, Alberta, southwestern Saskatchewan, and southern Yukon are predicted to experience below-normal temperatures. Meanwhile, most of Saskatchewan, the Northwest Territories, Manitoba, and northwestern Ontario will likely see near-normal temperatures.
In contrast, the rest of the country, including nearly all of Nunavut, is expected to have above-normal temperatures.
For those in the Prairies, the forecast indicates a significant drop in temperatures by the end of the month, with a chilly December on the horizon.
Farnell emphasizes that while some regions may not yet feel the cold, they should prepare for a shift in conditions soon.
Precipitation predictions and snow longevity
When it comes to precipitation, most of Canada can expect near-normal amounts, with exceptions in British Columbia and Alberta, where above-normal precipitation is anticipated.
This could mean a mix of rain and snow, particularly for coastal areas like Vancouver, which may experience snowstorms. The Great Lakes region could also see lake-effect snow, followed by systems that bring cold temperatures and strong winds.
The crucial question remains: if it snows, will it stick around? Farnell suggests that while snowfall is likely, it may be accompanied by rain, leading to melting in areas like Ontario and Quebec. However, the Maritimes might enjoy a longer-lasting snow cover compared to last year, thanks to colder temperatures settling in.
Interestingly, the Prairies have already experienced a dramatic shift, with snow covering the ground from Alberta to Manitoba. Farnell believes this snow could persist until Christmas, as deeper snow tends to reflect sunlight and contribute to colder nights.
Winter tourism and the future outlook
After a challenging winter for Canada’s tourism industry last year, characterized by low snowfall on ski hills, this season’s predictions bring hope. Ski resort towns are expected to be much happier with the winter conditions ahead. However, the duration of the cold weather will depend on various factors, including the behavior of the jet stream and potential blocking patterns that could shift cold air southward.
Farnell concludes that while forecasting winter weather has become increasingly complex due to climate changes, Canadians can still expect a traditional winter season. After all, we live in Canada, where winter is a defining characteristic of our climate.
