Winter Storm Update for Thunder Bay

Thunder Bay – Weather – Is your snow shovel ready? Are you? The first Winter Storm of the 2025 winter is headed right at the city. A Winter Warning remains in effect for the City of Thunder Bay updated Tuesday morning by Environment Canada. It looks like a powerful system as it gears up to bring heavy snow, strong northerly winds, and hazardous travel beginning this evening.

Make sure you are ready, stock up on ice melter, windshield washer fluid, and get the snow shovel ready!

Today’s Weather Overview

Current Conditions – Thunder Bay Airport (6:00 AM EST)

• Temperature: -3.5°C (Feels like -6°C with wind chill)

• Sky: Mostly cloudy

• Pressure: 101.5 kPa, rising

• Humidity: 93%

• Wind: SW 5 km/h

• Visibility: 24 km

For today, expect mainly cloudy skies with winds becoming northeast 20 km/h this morning. The high will reach +2°C, but it will feel closer to -5°C early on with the wind chill. UV index is 1 – low.

This is the calm before the storm.

Winter Storm Details

Winter Storm Warning – City of Thunder Bay

What:

• Total snowfall: 10 to 20 cm by late Wednesday night

• Conditions: Heavy snow and blowing snow, with significantly reduced visibility at times

When:

• This evening (Tuesday):

  • Cloudy, with snow and local blowing snow beginning in the evening

  • About 5 cm of snow tonight

  • Winds increasing from the north 30 km/h, gusting to 50

  • Low near -4°C, with wind chill around -11°C overnight

• Wednesday:

  • Snow and blowing snow throughout the day

  • Additional 5 to 10 cm of snow

  • Strong northwest winds 40 km/h, gusting to 70

  • Temperature steady near -4°C, wind chill close to -13°C

• Wednesday Night:

  • Cloudy with a 60% chance of snow, low near -6°C

Strong northerly and northwesterly winds will create areas of near-zero visibility, particularly in open areas and along exposed roads. Roads and walkways will likely be snow-covered, icy, and difficult to navigate. Consider postponing non-essential travel and outdoor activities until conditions improve late Wednesday night into Thursday.

Extended Storm Outlook

• Thursday, Nov 27: Cloudy with a 30% chance of flurries, high near -4°C.

• Thursday Night: Cloudy periods, 30% chance of flurries, low around -12°C.

• Friday, Nov 28: Sunny, high near -4°C.

• Friday Night: Cloudy periods, low close to -13°C.

Colder, calmer conditions move in behind the storm to end the week.

Wardrobe & Safety Tips

With wind chills dropping into the -11 to -13°C range during the storm:

• Wear a heavy insulated jacket or parka, plus layers underneath.

• Add a toque, scarf/neck warmer, and insulated gloves or mitts.

• Use winter boots with good traction; blowing snow will hide ice and ruts.

• If you must drive, keep a winter emergency kit in your vehicle and allow extra travel time.

Weather Trivia

Thunder Bay often sits near the transition zone of storm tracks coming out of the Prairies and U.S. Midwest. When strong lows pass to our east or southeast, cold Arctic air rushes in behind them, combining with wrap-around moisture to produce classic snow-and-blowing-snow events like this one—fast-moving, but impactful.