Squalls with wind gusts up to 60 knots, frequent lightning, hail of 1 to 2 centimetres and poor to very poor visibility in thunderstorms heavy at times are expected or occurring in the area.
Thunderstorms are moving east at 35 knots towards Lake Simcoe.
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Please continue to monitor alerts and forecasts issued by Environment Canada. For more information monitor Canadian Coast Guard radio or Weatheradio stations.