Squalls with wind gusts up to 40 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 near Hamilton are tracking east at 35 knots and are expected to track over western portions of Lake Ontario this morning.
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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.