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.

Conditions are favourable for the development of severe thunderstorms that may be capable of producing strong wind gusts, large hail and heavy rain.Hazards:Heavy rainfall with rainfall rates between 30 and 50 mm per hourWind gusts up to 90 km/hHail up to 2 cm in diameterThere is also the risk of a tornado.When:This afternoon into this evening.###Damage to roofs, fences, branches or soft shelters is possible.Heavy rain can cause flash flooding and significant reductions to visibility.Strong wind gusts can damage trees, buildings and overturn vehicles.Severe thunderstorm watches are issued when conditions are favourable for the development of thunderstorms capable of producing damaging hail, wind or rain.Please continue to monitor alerts and forecasts issued by Environment Canada. To report severe weather, send an email to ONstorm@ec.gc.ca or post reports on X using #ONStorm.For more information: https://www.ontario.ca/page/be-prepared-emergency.