Feb. 23, 2026: Thunder Bay Weather Forecast — Yellow Snowfall Warning for Tuesday

February 23, 2026

Thunder Bay weather forecast for Feb. 23, 2026: very cold today near -15°C, snow develops overnight, and a Yellow Snowfall Warning targets Tuesday with heavy snow, blowing snow, and hazardous travel on Highways 11 and 17

Thunder Bay is locked into a classic late-February pattern: bitter cold today, then a fast-moving “Alberta Clipper” swings in overnight and delivers a burst of wind-driven snow on Tuesday. Environment Canada has a Yellow Snowfall Warningin effect for the city, with travel impacts expected—especially on Highways 11 and 17.

Today’s Weather Overview

Current Conditions

As of 2:00 PM EST (Thunder Bay Airport), it’s mostly cloudy and very cold at -15.9°C, with SSW wind 13 km/hand a wind chill near -23. Pressure is 103.7 kPa and falling, a quiet hint that the next system is on the way. Visibility is still strong at 32 km, but that will change once the snow arrives overnight.

Through This Evening

Expect sunny skies shifting to a mix of sun and cloud this afternoon, with a high near -15°C and light winds up to 15 km/h. Wind chill stays harsh, around -19 this afternoon.

Tonight

Cloud increases, and snow becomes more likely late. Environment Canada calls for mainly cloudy conditions with snow beginning before morning and around 2 cm by daybreak. Winds turn southeast 20 km/h toward morning. Temperatures dip to about -17°C, then rise toward -10°C by morning—another sign the clipper is pushing milder air in ahead of the heavier snow.

Tomorrow’s Forecast

Expected Conditions (Next Three Days)

Tuesday, Feb. 24 — Snow + Blowing Snow Risk

Tuesday is the main event. The city forecast calls for snow with a local 10–15 cm, and a high near -4°C. Winds start south 20 km/h, then swing west 20 km/h around midday, which can create blowing snow on open stretches.

Warning details (bigger picture): Environment Canada’s Yellow Warning highlights 15–25 cm possible in the warned area, with southerly gusts up to 60 km/h producing reduced visibility in heavy and blowing snow. Snow begins late overnight or Tuesday morning, then diminishes late Tuesday afternoon or evening.

Travel note: Expect hazardous conditions on Highway 17 and Highway 11, especially during the morning and early afternoon when snowfall rates and wind impacts can peak.

Wednesday, Feb. 25 — Flurries Fade In and Out

Skies turn mixed with a 30% chance of flurries, and temperatures slide back colder with a high around -7°C. Wednesday night drops to about -18°C.

Thursday, Feb. 26 — Cloudy with On-and-Off Flurries

Thursday stays unsettled: cloudy with a 60% chance of flurries, high near -3°C. Thursday night: 40% chance of flurries, low around -6°C.

Looking ahead (quick snapshot): Friday may flirt with +3°C with a chance of flurries or rain showers, then colder air snaps back for the weekend—Saturday night is forecast near -30°C under clear skies.

Wardrobe Recommendations

Today (wind chill -20s): Wear a proper winter parka, insulated boots, and mitts over gloves. Add a neck warmer or balaclava—skin can cool fast in this dryness and cold.
Tonight into Tuesday: Pack for snow + wind: waterproof outer layer, snow pants if you’ll be outside, and goggles or glasses to help with blowing snow. Consider reflective gear if you’re walking near roads in low visibility.
Wednesday/Thursday: Keep the heavy layers—temperatures dip again, and flurries can sneak up on you. A spare hat and gloves in the car is still a smart move.

Weather Trivia

Thunder Bay’s coldest temperature on record is -43.2°C, set on January 31, 1996—a reminder that Northwestern Ontario still has real “deep-freeze” potential late in winter.

Summary

Thunder Bay weather forecast for Feb. 23, 2026: very cold today near -15°C, snow develops overnight, and a Yellow Snowfall Warning targets Tuesday with heavy snow, blowing snow, and hazardous travel on Highways 11 and 17.