Conditions are favourable for the development of squalls with wind gusts up to 40 knots, frequent lightning, hail and poor to very poor visibility in thunderstorms heavy at times.Scattered thunderstorms are expected this afternoon into this evening.###Poor to very poor visibility may contribute to voyage delays and make marine navigation hazardous.Please continue to monitor alerts and forecasts issued by Environment Canada. For more information monitor Canadian Coast Guard radio or Weatheradio stations.