Severe thunderstorms possible in and around Calgary Thursday
A heat warning was issued for most of east-central and southeastern Alberta on Wednesday, including Calgary, Red Deer and Edmonton.
Those warnings have been lifted for the QEII corridor Thursday due to cooler temperatures expected, but continued for southeastern Alberta with daytime highs expected to reach the low 30s.
Calgary weather forecast for Thursday, July 3, 2025
Heat warnings (pink) issued by Environment and Climate Change Canada on Thursday, July 3, 2025.
As expected, thunderstorms developed in central and southern Alberta on Wednesday with some cells rapidly intensifying into supercells.
Local storm chasers reported a tornado touched down near Drayton Valley on Wednesday around 5:30 p.m., but this has not been confirmed yet by Environment and Climate Change Canada.
There is a risk of severe thunderstorm activity across central and southern Alberta again on Thursday, with the moderate risk zone extending into Calgary.
If these storms do develop, the greatest threats include strong wind and large-sized hail.
Other potential risks include pockets of heavy rain, and possible rotation – especially in communities east of the QEII Highway.
Calgary weather forecast for Thursday, July 3, 2025
More seasonal temperatures are expected over the next few days – with daytime highs ranging from 20 C to 23 C from Thursday until Sunday.
The forecast for the Calgary Stampede parade should be pleasant, with a mix of sun and cloud and morning temperatures around 11 to 17 C.
More showers and thunderstorms are possible across southern Alberta on Saturday and Sunday, with heavier rainfall likely along the southern border.
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