Heavy Rainfall Expected in Thunder Bay Tonight

Rainfall warning

Thunder Bay Weather Update

Significant Rainfall Alert

Environment Canada has issued an alert for Thunder Bay, warning of significant rainfall tonight. A line of thunderstorms is expected to bring heavy rain to the area, with potential hazards including substantial rainfall amounts.


  • Total Rainfall: Expected to be between 30 to 50 mm, with locally higher amounts possible.


  • Duration: Tonight.


A line of thunderstorms will track over Thunder Bay this evening, bringing heavy rain with it. The forecast predicts rainfall amounts ranging from 30 to 50 mm. Areas west of Thunder Bay are expected to experience even higher rainfall amounts, where a rainfall warning is currently in effect.

Safety and Precautionary Measures

Flooding Concerns:

Residents should be aware of the potential for localized flooding. For detailed information regarding flooding risks and safety measures, consult your local Conservation Authority or the Ontario Ministry of Natural Resources and Forestry. Visit Ontario.ca/floods for the latest updates.

Weather Outlook

Current Conditions:

As of 9:13 PM EDT, the weather in Thunder Bay is cloudy with thunderstorms developing. The current temperature is 16°C with winds blowing from the east at 15 km/h. The barometric pressure is 1010 mb, and the humidity is at 85%.

Historical Weather Data for June 18:

  • Record High: 32.8°C (set in 1948)
  • Record Low: 1.1°C (set in 1996)
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