Heat dome planted over Alberta and Saskatchewan as more record temperatures expected

Heat dome planted over Alberta and Saskatchewan as more record temperatures expected

An unrelenting heat wave is gradually moving east across the Prairie provinces Wednesday, and parts of western Canada could again reach record-breaking high temperatures.

Much of British Columbia and Manitoba, parts of the Northwest Territories and all of Alberta and Saskatchewan are under Environment Canada heat warnings.

To blame is what meteorologists have called a heat dome; ridges of high pressure hovering over the Prairies that create an effect much like a pressure cooker.

According to David Phillips, a senior climatologist with Environment Canada, the heat dome is “a long term kind of thing … this one has legs.” 

He says that as the heat wave moves east it will become less intense and likely won’t reach the eastern provinces.

“Winnipeg would be sort of the last major city to see this heat dome,” he said.

Shattering record temperatures

Alberta broke 38 daily temperature records on Tuesday, according to Environment Canada, the hottest of those being 41.5 C in the Grande Prairie area, 40.7 C in the Beaverlodge area and and 39.3 C in the Drumheller area.

The province has had four straight days where it broke daily temperature records in what Phillips calls a “spectacular episode.”

Calgary neared its all-time high temperature record, hitting 36.3 C Tuesday. The hottest the city has ever been was 36.5 C, a record set in August 2018, according to Environment Canada.

Today’s high is expected to reach 35 C in Calgary, 37 C in Edmonton and 39 C in Grande Prairie.

Most of Manitoba was under a heat warning as of Wednesday evening. 

A new Canadian temperature record was set on Tuesday in the town of Lytton, B.C., which reached 49.6 C.

B.C. continues to see the highest temperatures in Canada — with temperatures in cities like Kelowna, Vernon and Kamloops remaining in the low 40s — though Phillips says temperatures will drop slightly.

“My sense is by this time at the end of the weekend, it will pretty well have passed through,” he said. “The warm temperatures will linger, but not as excruciatingly.”

The Northwest Territories and Yukon have broken 20 daily temperature records so far. It was 38.1 C in Nahanni Butte, N.W.T., on Monday, the highest temperature ever recorded in the region.

News source- CBC

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