At 7:51 p.m. PDT, Environment Canada meteorologists are tracking a severe thunderstorm capable of producing very strong wind gusts, up to nickel size hail and heavy rain.Radar indicates an area of strong thunderstorm producing nickel size hail over the the north end of Stave Lake. This area of thunderstorms is moving westwards and is largely confined to mountainous terrain, well north of the Fraser River.###Weather in the mountains can change suddenly resulting in hazardous driving conditions.Severe thunderstorm warnings are issued when imminent or occurring thunderstorms are likely to produce or are producing one or more of the following: large hail, damaging winds, torrential rainfall.Road conditions are available at www.drivebc.ca