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Snow day predictor for Thunder Bay

Snow-day forecast for Thunder Bay, where lake-effect snow and cold are both normal.

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Thunder Bay, Ontario

Updated Nov 4, 2026, 7:35 p.m.. Matched Thunder Bay. High snow tolerance (snow points × 0.72). High cold sensitivity.

The morning decision window has passed in this time zone. Tomorrow is the score to watch.

0%Snow day chance

School is probably on

Pack your bag. This forecast does not suggest a closure.

Buses: 4% chance of a cancellation or delay. Higher confidence.

0.0 cmSnowfall
0.0 cm/hPeak intensity
3.4°C8 a.m. temperature
-1.5°CWind chill
20 km/hWind
1920212223012345678
Snowfall · 0 pts
Overnight timing · 0 pts
Temperature and wind chill · 0 pts
Freezing rain · 0 pts
Wind · 0 pts

Biggest factor: nothing strong in the overnight window.

What should I do? Pack the school bag. Still check your board in the morning in case the buses are cancelled.

Advanced: adjust the forecast

Weather data: Open-Meteo. Postal codes use GeoNames forward-sortation centroids (CC BY 4.0); an unknown area falls back to OpenStreetMap Nominatim. This is an estimate, not a school-board announcement. Estimate only. Check your board.

Will school be closed tomorrow?

Votes on this Thunder Bay page. One vote per device today. This is not a board decision.

  • 0 · 0%No chance
  • 0 · 0%Maybe
  • 0 · 0%For sure

0 votes today.

Thunder Bay's winter is long, snowy, and cold, with Lake Superior feeding squalls. The profile is high snow tolerance and high cold sensitivity, the same pairing as Sudbury and the Sault. The suburban setting fits a city where a lot of students ride. Switch to rural if the route runs well outside the built-up area.

We are not naming a consortium URL we have not opened. The School Bus Ontario directory lists a Thunder Bay transportation service. Start there or at the school, not from memory of an old bookmark. This forecast does not know whether the harbour roads are drifted in.

We do not have a board page for every authority here. Use the official links and your school's site.

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Questions parents ask

Is the north side of the city scored separately from the south?

No. One point represents Thunder Bay. Lake-effect bands can still hit one neighbourhood harder. Use the score as a regional hint and the board's notice as the decision.

Why does cold count so much if the city is used to it?

Being used to snow is not the same as being indifferent to extreme wind chill. The cold factor is separate from the snow-tolerance multiplier, on purpose.