THUNDERSTORM: Montréal Island area
yellow watch – severe thunderstorm – in effect
Issued: 8:38 AM EDT, Sunday, August 2, 2026
Expires: 12:38 AM EDT, Monday, August 3, 2026
Urgency: Expected
Severity: Moderate
Impact Level: Moderate
Forecast Confidence: High
This afternoon and evening, conditions will be favourable for the development of severe thunderstorms capable of producing strong wind gusts and torrential downpours.
Nautical activities may be hazardous due to sudden, severe wind gusts over bodies of water.
Damage to roofs, fences, branches or soft shelters is possible.
Heavy rain can cause flash flooding and significant reductions to visibility.
Please continue to monitor alerts and forecasts issued by Environment Canada. To report severe weather, send an email to QCstorm@ec.gc.ca or post reports on social media using #QCStorm.
When thunder roars, go indoors! Lightning kills and injures Canadians every year.
SQUALL: Montréal to Trois-Rivières
squall watch in effect
Issued: 8:07 AM EDT, Sunday, August 2, 2026
Expires: 12:07 AM EDT, Monday, August 3, 2026
Urgency: Expected
Severity: Severe
This afternoon and this evening, conditions will be favourable for the development of squalls with wind gusts up to 85 km/h, frequent lightning and poor visibility due to showers, at times heavy.
Please continue to monitor alerts and forecasts issued by Environment Canada. For more information monitor Canadian Coast Guard radio or Weatheradio stations.
Mariners are advised to prepare for potential squalls. Vulnerable vessels are most at risk and should seek safe harbour if underway. Consider delaying or postponing travel in areas under the Squall Watch.
SQUALL: Richelieu River and Northern Lake Champlain
squall watch in effect
Issued: 8:07 AM EDT, Sunday, August 2, 2026
Expires: 12:07 AM EDT, Monday, August 3, 2026
Urgency: Expected
Severity: Severe
This afternoon and this evening, conditions will be favourable for the development of squalls with wind gusts up to 85 km/h, frequent lightning and poor visibility due to showers, at times heavy.
Please continue to monitor alerts and forecasts issued by Environment Canada. For more information monitor Canadian Coast Guard radio or Weatheradio stations.
Mariners are advised to prepare for potential squalls. Vulnerable vessels are most at risk and should seek safe harbour if underway. Consider delaying or postponing travel in areas under the Squall Watch.
