Squalls with wind gusts up to 40 knots, frequent lightning and hail up to 2 centimetres are expected or occurring in the area.
As of 12:52 p.m. EDT, a thunderstorm located 42 nautical miles west of Port Elgin is moving southeastward at 25 knots.
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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.