Critical: Thunderstorm - Parts of Alberta
Source: Environment Canada
Issued: Aug 11, 2026 at 17:04 HRS
History:
-
- Alert: Aug 11, 2026 at 16:37 HRS
- Update: Aug 11, 2026 at 16:50 HRS
- Update: Aug 11, 2026 at 16:57 HRS
- Update: Aug 11, 2026 at 17:04 HRS
Description: Red warning - severe thunderstorm - in effect
At 5:02 p.m. MDT, an extremely dangerous thunderstorm is located over Claresholm. This extremely dangerous thunderstorm is moving southeast at 50 km/h. Damaging wind gusts, baseball size or greater hail and heavy rain are possible. Locations and nearby areas that could be impacted include: Claresholm, Nobleford, Monarch
Driving conditions will be difficult. Buildings and/or many trees will be destroyed. Large hail will cause significant damage and injury. Severe thunderstorm warnings are issued when imminent or occurring thunderstorms are expected to produce damaging hail, wind or rain.
Area: M.D. of Willow Creek near Claresholm and Stavely
Affected areas (13):
- Willow Creek No. 26
- Claresholm
- Stavely
- Vulcan County
- Carmangay
- Champion
- Granum
- Fort Macleod
- Lethbridge County
- Coalhurst
- Nobleford
- Barons
- Blood 148
Action to take:
- Take cover immediately if threatening weather approaches
- Intense lightning is likely and tornadoes are possible with any thunderstorm that develops
Additional information:


