THUNDER BAY – WEATHER – Thunder Bay is heading into Thursday night under light snow and low cloud, with a Yellow Advisory (Freezing Drizzle)now in effect for the city. The next 12–24 hours will be tricky:

freezing drizzle is expected to begin overnight or early Friday, creating icy, slippery roads and sidewalks, followed by a transition toward rain Friday afternoon—with a risk of freezing rain during the changeover.

Current Conditions (Observed 6:00 PM EST, Thursday March 5, 2026)

• Condition: Light snow

• Temperature: -9.3°C (headline: -9°C)

• Wind: ENE 11 km/h

• Wind Chill: -15

• Pressure: 102.3 kPa, falling

• Humidity: 91%

• Dew Point: -10.5°C

• Visibility: 13 km

Snow is light right now, but the moisture in the air is high—setting the stage for drizzle that freezes on contact once temperatures stay below zero overnight.

Yellow Advisory – Freezing Drizzle (Issued 6:26 PM EST)

• Impact level: Moderate

• Forecast confidence: High

• What: Freezing drizzle causing icy and slippery conditions

• When: Beginning overnight or early Friday morning, ending Friday afternoon or evening

• Main hazard: Slips/falls and hazardous driving, especially on untreated surfaces

Tonight’s Forecast

Tonight (Thursday Night)

• Sky: Cloudy

• Precipitation: 30% chance of snow with a risk of freezing drizzle

• Fog: Fog patches developing overnight

• Wind: Up to 15 km/h

• Low: -6°C

• Wind Chill: About -12 this evening

Expected Conditions (Next Three Days)

Friday, March 6

• Morning to early afternoon: Cloudy with 70% chance of freezing drizzle

• Afternoon: Periods of rain begin

• Main risk: Freezing rain in the afternoon during the transition

• Fog: Fog patches

• Wind: Up to 15 km/h

• High: +2°C

• Wind Chill: Near -6 in the morning

• UV Index: 1 (Low)

Friday Night

• Precipitation: Periods of rain changing to snow overnight

• Snowfall: About 2 cm

• Fog: Fog patches dissipating after midnight

• Low: -4°C

• Wind Chill: Near -7 overnight

Saturday, March 7

• Day: Mix of sun and cloud with 40% chance of flurries

  • High: +3°C

• Night: Clear

  • Low: -3°C

Wardrobe and Safety Recommendations

• Footwear: Treat tonight and Friday as “ice risk” hours—wear boots with strong traction; ice cleats help a lot on sidewalks.

• Driving: Slow down early Friday, increase following distance, and expect slick spots on bridges, hills, intersections, and untreated side roads.

• Plan for changeover: Friday’s shift to rain can create slush, followed by refreeze Friday night as temps drop back below zero.

• Visibility: If fog patches thicken, use low beams and give extra time for travel.

Weather Trivia

Freezing drizzle often forms in low cloud when tiny supercooled droplets fall through air just below 0°C. It can be more dangerous than light snow because it creates a thin, nearly invisible glaze—what many people call “black ice.”

Summary of Weather Forecast

Thunder Bay weather update for Thursday evening, March 5, 2026: light snow and -9°C at 6:00 PM with falling pressure. A Yellow Advisory for freezing drizzle is in effect, with freezing drizzle expected overnight into Friday, creating icy and slippery conditions. Friday brings a 70% chance of freezing drizzle early, rain developing in the afternoon with a risk of freezing rain, then rain changing to snow Friday night.