NetNewsLedger Weather Desk – Monday, June 23, 2025 – 6:00 AM EDT
Early Morning Thunder Rolls in Over Thunder Bay
Thunder Bay residents are waking up to an ominous weather alert this Monday morning as Environment Canada has issued a Severe Thunderstorm Warning for the city and surrounding regions. The Weather Desk urges all residents to remain alert and take shelter if dangerous conditions approach.
Severe Storms Moving Fast – Take Cover
At 4:49 AM CDT (5:49 AM EDT), meteorologists began tracking a fast-moving cluster of severe thunderstorms approximately 100 kilometres southwest of Thunder Bay. These storms are racing northeast at 80 km/h, expected to sweep across the region rapidly this morning.
Environment Canada warns that the storms are capable of producing toonie-sized hail, wind gusts up to 100 km/h, heavy rainfall, and possibly a tornado. This is not your average thunderstorm—take it seriously.
Areas Impacted by This Severe Storm
The storm system is expected to affect a wide swath of the Thunder Bay District including:
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City of Thunder Bay
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Kakabeka Falls Provincial Park
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Arrow Lake & Arrow Lake Provincial Park
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La Verendrye & Pigeon River Provincial Parks
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Cloud Bay, Whitefish Lake, Northern Light Lake
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Remicks, Gneiss Lake, Gunflint Lake, and Moose Lake
Current Conditions and Forecast
As of 6:00 AM EDT, Thunder Bay is sitting at 16°C, with 100% humidity, mostly cloudy skies, and light winds out of the east-northeast at 5 km/h. The barometric pressure is falling at 100.6 kPa, a clear sign of the unstable weather system.
The forecast calls for a 60% chance of showers or thunderstorms continuing into early this afternoon, followed by clearing skies and a high of 25°C. With the humidity factored in, expect a humidex of 33, so it’s not just wet—it’ll be steamy.
Tonight, the skies clear, but gusty west winds up to 50 km/h will ease by evening. Low: 11°C.
Tuesday brings relief with sunshine, a high of 24°C, and a UV index of 9—very high. Don’t forget the sunscreen!
What to Do Right Now
Environment Canada and Emergency Management Ontario strongly urge residents to take immediate shelter if severe weather approaches. If you’re outdoors, move indoors quickly—preferably to a basement or interior room away from windows. Large hail and wind gusts of 100 km/h can cause structural damage, down power lines, and launch debris.
A tornado is also possible with this system. If a Tornado Warning is issued, do not hesitate: take shelter in a safe location immediately.
Weather Trivia:
Did you know the strongest recorded wind gust in Thunder Bay during a thunderstorm reached 113 km/h back in 1999? Today’s storm isn’t far off that mark—let’s hope the record stands.
