How a typhoon will reinforce temperature flip-flop in Canada
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A temperature shift is ongoing in Canada and will continue into next week, with cooler fall conditions expected in the East while the West retains warmer patterns. Typhoon Choi Wan is going to reinforce that pattern into the middle of the week as the storm injects itself into the jet stream, with the oscillation leading to troughing in the East and ridging in the West. SEE ALSO: October Outlook: Canada's great fall flip—what to expect this monthTyphoons that recurve out of the western Pacific Ocean often race toward the Arctic Circle and disrupt the jet stream. These interruptions can have ripple effects that carry for thousands of kilometres downwind. Dry, warm weather settles in the WestA ridge of high pressure will strengthen and spread north and east across B. C. and the Prairies through this weekend. As a result, dry conditions and above-normal temperatures are expected. Southwestern Canada's normal daytime highs for early October range in the mid-teens. This weekend, however, a large region will likely tip into the low- to mid-20s. Sunday will see feels-like values in the 20s in B. C.'s Okanagan Valley.
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