Calgary Slammed by Severe Storm Threat as Stampede Nears Finale

Calgary Slammed by Severe Storm Threat as Stampede Nears Finale

Calgary Slammed by Severe Storm Threat as Stampede Nears Finale

Hey everyone, just wanted to give you an important weather update if you’re in or around Calgary — things are getting serious out there.

So, Sunday afternoon brought in some alarming news: Environment Canada issued a severe thunderstorm watch for the Calgary area. And it’s not just your average summer storm — we’re talking about the kind of weather that could bring tornadoes, damaging hail, flash flooding , and strong wind gusts . In fact, a tornado watch has already been put into effect across southern Alberta, meaning conditions are ripe for twisters to form.

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What’s wild is how this is all coinciding with the final day of the Calgary Stampede — usually known for sun, crowds, and celebration. But now, Mother Nature is threatening to steal the spotlight. The skies are expected to turn quickly, with thunderstorms building along the foothills , then rolling across Calgary, Medicine Hat, and Lethbridge throughout the evening. These storms aren’t just about lightning — forecasters are warning of large hail , torrential rain , and wind that could knock over structures , especially in areas with poor drainage.

If you're planning to attend any final Stampede events, don’t take any chances . Have a shelter plan ready. These storms can escalate quickly. One minute it’s sunny, the next — you're running for cover. It’s a reminder that even in July, Alberta weather can turn on a dime.

And here’s the kicker: a serious cooldown is coming right behind this storm. By Monday, we're looking at temperatures 10 to 15 degrees below normal , and a lot of rain — maybe 30 to 50 mm in places like Calgary and Banff . Some areas like Jasper could even see summer snow , with freezing levels expected to drop to around 2,300 metres. That’s right — snow in mid-July . It’s not expected to break records, but after the recent heat, it’s going to feel like we’ve skipped straight into fall.

So, here’s the bottom line: be weather aware . Keep your phone alerts on, check for updates frequently, and if you're out and about — especially at any outdoor events — know where you can take shelter fast. These storms are no joke, and the impacts could last into mid-week with rain and cooler temps sticking around until at least Wednesday.

Stay safe, Calgary.

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