A storm that originated in Siberia will swing across western and central Canada next week with a taste of fall weather a little early.
The storm is moving through Alaska and the Gulf of Alaska this weekend.
A change in the weather pattern, more specifically, a southward dip in high-altitude winds, known as the jet stream, will allow the storm and the colder air that follows to roll across British Columbia and over the Prairies next week.
The storm is also forecast to produce a broad area of showers and gusty winds advancing from the Pacific Coast to parts of the Prairies.
Snow showers will occur in the higher elevations of the Rockies and in some of the passes.
The pattern will bring the coolest weather of the season to cities from Prince George and Kamloops, British Columbia, to Edmonton and Calgary, Alberta, and Saskatoon and Regina, Saskatchewan. It is not impossible for a few of these cities and others to have wet snowflakes mixing in during some of the showers.
Ahead of the storm system and its cooler air will be a push of warmth this weekend over part of western and central Canada.
The warmth is developing as an atmospheric rebound occurs with cooler air pushing across the central and eastern United States.
As the cooler air pushes into western and central Canada next week, a warmup will begin over much of southeastern Canada next week.
Tropical air pushing northward from the Atlantic may even allow a close or direct encounter with Leslie in Newfoundland. Warm waters in the vicinity could keep Leslie as a tropical system longer than usual.
Meteorologist Meghan Evans and Canadian Weather Expert Brett Anderson expect above-average temperatures in southeastern Canada and below-average temperatures in western Canada spanning September through November.
The first official day of fall for 2012 is Saturday, Sept. 22.
Warmth is forecast to build over much of the eastern half of the nation by July, with Alaska of all places helping out.
Join us on Thursday for AccuWeather LIVE, we will discuss the debate of climate change and hurricane frequency and the top five things you need to know about summer weather.
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