The thunderstorms affect a broad area of Smoky Lake county, Lamont County, south to a 20 km/h north of Tofield.
These storms are moving northeast at 50 km/h.
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Heavy rain may cause flash flooding and significant reductions to visibility. Large hail may cause significant damage and injury.
Severe thunderstorm warnings are issued when imminent or occurring thunderstorms are expected to produce damaging hail, wind or rain.