Thunder Bay – WEATHER – Thunder Bay gets a brief breather this morning under mainly clear skies, but it’s the classic “quiet before the storm.” Environment Canada has issued a Yellow Warning – Winter Storm for the City of Thunder Bay, with high-impact conditions expected tonight into Wednesday night.
Snow will arrive overnight, becoming heavy at times, and strong easterly winds will create blowing snow and sharply reduced visibility.
Winter Storm Warning at a Glance
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Snowfall: 10 to 20 cm (higher amounts possible over higher terrain)
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Wind: gusts up to 60 km/h
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Main impacts: blowing snow, near-zero visibility at times, hazardous travel, possible road closures
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Timing: Tonight through Wednesday night
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Track uncertainty: heaviest snow is expected south of the city near the U.S. border, but the storm track could shift, changing totals locally.
Today’s Thunder Bay Weather Overview
Current Conditions
At 6:00 AM EST at Thunder Bay Airport, conditions were mainly clear and cold:
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Temperature: -7.1°C
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Wind chill: -9
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Wind: WNW 3 km/h (light early)
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Humidity: 88%
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Pressure: 101.9 kPa and rising
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Visibility: 24 km
Today (Tuesday)
Today stays sunny and relatively calm for February, but you’ll notice the setup changing late in the day as winds turn and increase.
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High: 0°C
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Wind: becoming NE 20 km/h gusting to 40 late this afternoon
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Wind chill: near -14 this morning
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UV index: 1 (Low)
If you have errands, today is the best travel window before conditions deteriorate tonight.
Thunder Bay Weather
Expected Conditions (Next 3 Days)
Tonight (Tuesday Night)
Cloud increases near midnight, then snow begins and becomes heavy at times. Local blowing snow develops overnight, with blowing snow before morning as winds ramp up hard.
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Snow amount overnight: about 5 cm
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Wind: NE 20 gusting 50, becoming E 40 gusting 60 before morning
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Low: -6°C
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Wind chill: -15 overnight
Wednesday, February 18
This is the peak impact period: snow at times heavy and blowing snow.
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Snow amount Wednesday: 10 to 15 cm
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Wind: E 40 km/h gusting to 60
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High: -2°C
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Wind chill: -15 morning, -10 afternoon
Visibility may drop suddenly—especially on open roads and higher terrain.
Wednesday Night into Thursday
Snow continues with periods of snow Wednesday night and local blowing snow, still windy.
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Wednesday night low: -8°C
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Thursday: periods of snow, high -4°C
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Thursday night: 60% chance of snow, low -9°C
Wardrobe Recommendations
Today is manageable, but tonight and Wednesday are full winter-storm conditions:
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Today: winter jacket, hat, and mitts for the morning cold; wind increases later.
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Tonight/Wednesday: upgrade to storm gear—insulated coat, snow pants if outdoors, warm boots, and something that blocks wind.
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Visibility protection: goggles or glasses help in blowing snow. A neck gaiter/balaclava keeps exposed skin protected.
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Travel prep: top up winter windshield washer fluid, pack a brush/scraper, and keep a blanket/charger in the vehicle. Blowing snow can coat your windshield quickly and visibility can drop fast.
Weather Trivia
Blowing snow can be more dangerous than the snowfall total suggests. With gusts around 60 km/h, snow on the ground gets lifted and recycled through the air—creating whiteouts even when snowfall rates briefly ease. That’s why storms like this can shut down highways despite “moderate” snow amounts.
Summary
Thunder Bay weather for Tuesday, February 17, 2026: sunny today with a high of 0°C, but a Yellow Winter Storm Warning begins tonight. Snow heavy at times and blowing snow are expected tonight into Wednesday night, with 10–20 cm possible and east wind gusts up to 60 km/h reducing visibility and making travel hazardous.
