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Multi-day severe storm risk as heat and humidity builds over the Prairies

Multi-day severe storm risk as heat and humidity builds over the Prairies
Multi-day severe storm risk as heat and humidity builds over the Prairies

اخبار العرب-كندا 24: الأربعاء 10 يوليو 2024 10:22 صباحاً

Severe thunderstorm chances are building across the Prairies, as a hot and muggy air mass pushes humidex values well into the 30s and even 40s for some.

The risk will span all three Prairie provinces on both Wednesday and Thursday, with the chance for heavy rain, strong winds, and very large hail where storms develop.

DON'T MISS: 10 ways The Weather Network app can help you plan for summer weather

The risk pops up as heat warnings continue to cover much of the region, as well, with Environment and Climate Change Canada advising folks to take precautions to protect themselves, their families and their neighbours.

The heat will relax somewhat and shift east late week, with a shot of much cooler weather expected for northern areas late week, and into the weekend across the south. This will be followed by more heat for next week.

Heat continues as storm threat increases for Wednesday and Thursday

Wednesday will see widespread, 30-degree daytime highs. That's after several communities broke new daytime high temperature records to start the week on Monday.

Baron - PR Wednesday temps - July 10

Baron - PR Wednesday temps - July 10

Temperatures will be 10-13°C above normal across most of the province of Alberta on Wednesday. Through the day, dew points will approach the upper teens, making the air mass uncharacteristically muggy with humidex values tipping into the upper 30s.

Connor O'Donovan: People using mist to stay cool at the Calgary Stampede. July 8, 2024

Connor O'Donovan: People using mist to stay cool at the Calgary Stampede. July 8, 2024

People using misting stations at the Calgary Stampede to help cool down. (Connor O'Donovan/The Weather Network)

RELATED: What is 'humidex' and how does it impact our bodies?

Temperatures will reach their highest of the year so far, with places like Calgary reaching 34°C and Edmonton expected to reach 35°C. If Edmonton reaches 35°C, that would put it in the top 10 warmest days on record, going back to 1880.

To put it into perspective, the second-warmest temperature on record occurred in 2021 during the heat dome, when Edmonton reached 37°C.

Baron - PR Thursday temps - July 10

Baron - PR Thursday temps - July 10

Across parts of central and southern Saskatchewan and Manitoba, the humidex will have things feeling closer to 40 by Thursday.

With the extreme heat comes the storm risk, as well. Thunderstorms will reappear in the forecast on Wednesday as the "ring of fire," the northern edge of the heat dome, will set up in the area. Because of the excessive heat generated and radiated by the heat dome, storms along its boundary can be severe, as they tap into the extreme heat.

Ring of Fire storm explainer

Ring of Fire storm explainer

Ring of fire explainer (The Weather Network)

Storms from Calgary to Edmonton will be quite isolated as it will be hard for storms to develop with the extreme heat, but farther north, a cold front will spark many storms, some even with very large hail (tennis ball-sized).

Wednesday evening could see a couple isolated thunderstorms push off the southern foothills and track eastward through the night.

Baron - Wednesday PR risk - July 10

Baron - Wednesday PR risk - July 10

As the trough pushes into southern Saskatchewan, there could be a few overnight thunderstorms that persist into early Thursday morning.

Through Thursday afternoon, there's a better chance of storms developing across southern Alberta and Saskatchewan, with the potential for severe conditions during the late afternoon and evening hours in southern Saskatchewan.

Baron - PR Thursday risk - July 10

Baron - PR Thursday risk - July 10

Currently, computer models are hinting at isolated severe storms crossing the QE2 in Alberta between Red Deer and Calgary Thursday evening.

WATCH: Stampede under heat warning as temperatures soar

Click here to view the video

Stay tuned to The Weather Network for the latest forecast updates across the Prairies.

Thumbnail courtesy of Ela Thakore.

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