High winds on Wednesday blew a tree house over in Medicine Hat. (Photo: Jenna Lynn)

By David Opinko

Triple-digit wind speeds recorded Wednesday in southern Alberta

Dec 19, 2025 | 9:00 AM

Environment Canada has released more details about this week’s storm.

They say an “Alberta clipper,” or a low-pressure winter storm that originates in the province, tore through southern Alberta on Wednesday, Dec. 17.

In Onefour, an agricultural research station in the southeast, wind gusts reached up to 131 km/hr.

The weather forecaster also recorded triple-digit wind speeds at the Waterton Park Gate (126 km/hr), Lethbridge (113 km/hr), Bow Island (107 km/hr), Beaver Mines (106 km/hr), and Pincher Creek (102 km/hr).

As well, high wind speeds were recorded in communities such as Carway (98), Brooks (96), Cardston (91), Medicine Hat (87), Milk River (87), and Calgary (81).

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The winter storm led to several collisions in the region, including a 100-vehicle pileup in Calgary.

In Medicine Hat, the winds knocked out the power in some areas and even toppled a tree house.

READ MORE: Damage and power outages caused by winter storm through Medicine Hat Wednesday