From: 2026/06/17, 18:00
To: 2026/06/18, 05:00

Conditions are favourable for the development of squalls with wind gusts up to 50 knots, frequent lightning and poor to very poor visibility in thunderstorms heavy at times. A low pressure system over Michigan is expected to bring thunderstorms this evening and possibly overnight. There is also the risk of waterspouts. ### Please continue to monitor alerts and forecasts issued by Environment Canada. For more information monitor Canadian Coast Guard radio or Weatheradio stations.

From: 2026/06/18, 02:00
To: 2026/06/18, 07:24

Yellow warning - wind - in effect Strong southwesterly winds are expected. What: Southwesterly winds gusting 70 to 90 km/h. When: Overnight into Thursday morning. Additional information: Southwesterly winds gusting 70 to 90 km/h are expected to develop as a strong low pressure system tracks over southern Ontario. ### Local utility outages are possible. Damage to roofs, fences, branches or soft shelters is possible. Some property damage is possible. Wind warnings are issued when there is a significant risk of damaging winds. Please continue to monitor alerts and forecasts issued by Environment Canada. To report severe weather, send an email to [email protected] or post reports on X using #ONStorm.

From: 2026/06/17, 20:00
To: 2026/06/18, 07:01

Heavy rain and thunderstorms tonight. What: Rainfall amounts in excess of 40 mm. Risk of severe thunderstorms. When: Beginning early this evening continuing overnight. Additional information: Showers are expected early this evening and will intensify as a strong low pressure system approaches the area. There is a potential for severe thunderstorms late this evening and overnight with heavy rain and strong wind gusts being the primary threats. Rainfall amounts of 40 mm or greater are possible as a result of the thunderstorms and showers with this system. Watches or warnings may be issued closer to the event as the path of this low pressure system becomes more certain. ### Please continue to monitor alerts and forecasts issued by Environment Canada. To report severe weather, send an email to [email protected] or post reports on X using #ONStorm.