Environment Canada issues tornado warning for areas of Bonnyville SHARE ON: Environment Canada has issued a severe thunderstorm warning, with the possibility it could produce a tornado. A tornado has been spotted 25 km east of Lac La Biche and is moving northeast at 50 km/h, Environment Canada says, Damaging winds, large hail and locally intense rainfall are also possible. Take cover immediately, if threatening weather approaches. If you hear a roaring sound or see a funnel cloud, swirling debris near the ground, flying debris, or any threatening weather approaching, take shelter immediately. A tornado can be a dangerous weather situation, Environment Canada says, and people should know what to do in a tornado situation.