Summer weather in Canada expected to contain big storms and heat in most places

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Seasonal or above-normal temperatures across much of the country will give Canadians a chance to enjoy summer, but forecasts from a leading national forecaster warn that the humidity could welcome a few rather stormy months.

Chris Scott, chief meteorologist at The Weather Network, says the heat associated with an active jet stream will bring above normal precipitation across the Prairies into Ontario and Quebec.

While that “doesn’t mean every day is going to be a washout,” Scott says he expects “pretty intense storms from time to time.”

Scott says Western Canada is not preparing to face the same conditions that led to last year’s devastating heat wave and wildfires in British Columbia.

The westernmost province is expected to gradually emerge from a cool spring and return to near-normal temperatures from June, which he says will delay snowmelt and slow the start of the fire season. forest.

In the Rockies, extremes of spring drought in Alberta and flooding in Manitoba will begin to ease, he said, as precipitation in the Prairies returns to more normal levels.

However, he noted that the threat of drought conditions persists in southern Alberta, which could be influenced by “epic heat” expected to grip areas just south of the border.

“We’ll have to look at exactly where this big heat dome is setting up,” he said.

“It’s setting the stage for thunderstorms… We can get big hail, big winds across the Prairies and we think this summer actually has a good chance of having a few more of those big storms than usual. “

In Ontario and Quebec, most of the region will likely experience a “very hot and humid summer” that won’t quite reach the levels of last year’s sweltering June.

Hot summer temperatures, big #storms to sweep across much of Canada, Weather Network predicts. #Summer #Forecast

“We’re going to see a lot of hot weather, a lot of dry days,” he said, ahead of the start of the meteorological summer on June 1. The official start of summer is June 21.

“But when we have the patterns for the precipitation, be very vigilant this summer because we think these storms can really pack a punch.”

Scott does not anticipate a duplication of the “extremely rare” severe winds and thunderstorms that swept through Ontario and Quebec on May 21, but he urges Canadians – especially campers – to be vigilant about weather conditions in rapid evolution.

The Atlantic provinces can expect above normal precipitation and temperatures. These factors suggest a very active hurricane season in the region, he said.

“We can’t say exactly which storms are doing what; seasonal forecasts are a sketch,” he said.

“But it’s a warning if you’re in Halifax or Yarmouth – wherever you are in Atlantic Canada and frankly in Quebec and Ontario. Be aware of the situation, especially in July and August with the trend of tropical storms and hurricanes.”

Temperatures are expected to be below normal in the Yukon and Nunavut, while precipitation remains near normal.

Around Hudson Bay, he said he expects above-normal precipitation.

Scott noted that while extreme heat scenarios are on the rise and will continue in that direction, some of the recent phenomena related to extreme weather events, such as severe thunderstorms, are more difficult to predict.

“We have more heat waves, absolutely 100%. We also have less cold waves,” he noted.

“In between you have this mix of heavier rain, but what about high winds, hail and tornadoes?

This report from The Canadian Press was first published on May 31, 2022.

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