Canada’s first countrywide Arctic air outbreak arrives to end November
Get ready for below-seasonal temperatures to spill across Canada from coast to coast to end the month of November
The season’s first significant and widespread outbreak of cold Arctic air will spread across Canada to end November.
Temperatures could dip 10 to 15 degrees below seasonal across Western Canada before the cold air spreads all the way east, potentially triggering several days of disruptive lake-effect snow.
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Widespread cold air ends November with a shiver
A potent trough in the jet stream will set the stage for Arctic air to flood toward southern latitudes heading into the final week of November.
Below-seasonal temperatures will filter across British Columbia and spill onto the Prairies through the first half of next week.
Forecasters expect readings to come in as much as 10 to 15 degrees below seasonal for the end of November.
How cold could it get? Current indications point toward daytime highs mired in the minus-teens across much of the Prairies on the final day of the month.
Arctic air kicks off significant lake-effect snow
The surge of Arctic air will continue spreading east through the second half of the week as the core of the trough sets up shop over Hudson Bay.
We can expect to see the cold temperatures reach all the way to the Atlantic coast. Temperatures won’t be the only headline with this Arctic outbreak.
Frosty winds blowing across the relatively warm Great Lakes is the perfect setup for a potentially significant multi-day lake-effect snow event. While it’s far too early for specifics, disruptive snowfall is possible across the region’s traditional snowbelt communities.
U.S. holiday travel may be affected by a high-impact storm
We’ll watch below-seasonal conditions spread all the way to the Gulf of Mexico as the jet stream sags south of the border.
A significant storm is expected to develop over the central U.S. by the middle of next week and continue pushing east over the next couple of days.
In addition to potential impacts across Eastern Canada, anyone travelling for American Thanksgiving on Thursday, Nov. 27, should keep a close eye on the forecast for possible disruptions.
Stay with The Weather Network for all the latest on conditions across Canada