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The national weather agency issued a severe thunderstorm warning for part of Yellowhead County, Alta., Saturday afternoon, with a red tornado warning in effect earlier now cancelled.
Environment Canada meteorologists are tracking a severe thunderstorm that could produce hail bigger than a baseball, the alert says.
Damaging winds and intense rainfall are also possible, it adds.
As of 7:43 p.m. MT, the storm was just west of Entwistle and travelling east at 45 km/h, the alert says.
A tornado warning for parts of Yellowhead County was cancelled at the same time as the latest thunderstorm warning update, as tornadoes are no longer expected in the area according to Environment Canada.
The agency says people should take cover immediately if threatening weather approaches, and that tornadoes are possible with any thunderstorm.
Severe thunderstorm warnings are issued when conditions are favourable for thunderstorms that could produce damaging hail, wind or rain.
