SQUALL: Richelieu River and Northern Lake Champlain
squall warning in effect
Issued: 2:06 PM EDT, Wednesday, August 12, 2026
Expires: 4:04 PM EDT, Wednesday, August 12, 2026
Urgency: Immediate
Severity: Severe
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 squalls. If underway, seek safe harbour immediately. Consider delaying or postponing travel in areas under the squall warning.
THUNDERSTORM: Verchères – Beloeil area
yellow warning – severe thunderstorm – in effect
Issued: 2:04 PM EDT, Wednesday, August 12, 2026
Expires: 4:02 PM EDT, Wednesday, August 12, 2026
Urgency: Immediate
Severity: Moderate
At 2:03 p.m. EDT, a severe thunderstorm is located near Lavaltrie. This severe thunderstorm is moving southeast at 40 km/h. Damaging wind gusts, up to quarter size hail and heavy rain are possible.
Locations and nearby areas that could be impacted include: Saint-Denis-sur-Richelieu, Saint-Charles-sur-Richelieu, Saint-Jude, La Présentation, Sainte-Madeleine, Saint-Hyacinthe, Sainte-Hélène-de-Bagot, Saint-Dominique, Saint-Pie
Damage to roofs, fences, soft shelters or trees is likely. Local utility outages are likely.
Severe thunderstorm warnings are issued when imminent or occurring thunderstorms are expected to produce damaging hail, wind or rain.
Take immediate cover if a thunderstorm approaches. If outside, protect yourself from flying debris and hail.
SQUALL: Montréal to Trois-Rivières
squall watch in effect
Issued: 1:58 PM EDT, Wednesday, August 12, 2026
Expires: 10:30 PM EDT, Wednesday, August 12, 2026
Urgency: Expected
Severity: Severe
Conditions are favourable for the development of squalls with wind gusts up to 65 km/h.
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.
