Thunder Bay Faces Potential Severe Thunderstorms

Thunderstorm watch

Severe Thunderstorm Watch in Effect for the City of Thunder Bay

Thunder Bay – Weather – A severe thunderstorm watch has been issued for the City of Thunder Bay. Atmospheric conditions are favorable for the development of severe thunderstorms that may produce strong wind gusts, large hail, and heavy rain. Residents should stay alert and be prepared for rapidly changing weather conditions.

Weather Hazards and Timing


  • Hail ranging from toonie to golf ball size
  • Strong wind gusts reaching up to 90 km/h


  • This afternoon and early this evening

Discussion and Safety Measures

Severe thunderstorms are expected to develop near the Ontario-Minnesota border this afternoon and move eastward. The atmospheric conditions conducive to severe weather are present across Ontario. However, there is a possibility that the strongest storms might remain close to or just south of the border.

Large hail has the potential to damage property and cause injuries. Strong wind gusts can toss loose objects, damage weak structures, break branches off trees, and overturn large vehicles. Severe thunderstorms can also produce tornadoes, adding to the danger. Water-related activities may be particularly hazardous due to sudden and violent gusts of wind over bodies of water.

Lightning is another significant threat, causing fatalities and injuries in Canada each year. It is crucial to remember the adage: “When thunder roars, go indoors!” Seek shelter immediately if you hear thunder.

Emergency Management Ontario advises that you take cover immediately if threatening weather approaches. Severe thunderstorm watches are issued when conditions are ripe for the development of storms that could produce large hail, damaging winds, or torrential rainfall.

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