Snow day predictor by Canadian provinceEvery province and territory, one tuned forecast engine

All ten provinces and three territories — Ontario, Quebec, British Columbia, Alberta, Manitoba, Saskatchewan, Nova Scotia, New Brunswick, Prince Edward Island, Newfoundland and Labrador, Yukon, Northwest Territories, and Nunavut. The predictor uses 14 distinct regional profiles, including separate coastal vs interior British Columbia and Greater Toronto Area vs rural and Northern Ontario splits, because closure thresholds vary dramatically inside the larger provinces.

A 15 cm overnight snowfall closes Vancouver schools but is a normal Tuesday in Calgary. A −40 °C wind chill that is routine in Winnipeg would shut down every district in coastal British Columbia. School boards across Canada have very different tolerance thresholds shaped by local infrastructure, plowing capacity, bus route length, and historical practice — so a single nationwide model would be wrong for almost every region.

Coastal British Columbia (Vancouver, Surrey, Victoria) closes most often per cm of snowfall because the region rarely sees winter weather and has minimal salt and plow infrastructure. By absolute snow day count, however, Atlantic Canada and the territories tend to lead because of frequent nor’easters and multi-day blizzards. Alberta, despite heavy snow, has the fewest snow days because boards operate through conditions that would close schools elsewhere.

Alberta and Newfoundland and Labrador are the two most weather-tolerant provinces in Canada. The Calgary Board of Education and Edmonton Public Schools routinely operate through 20–25 cm snowfalls, and the NLESD in Newfoundland keeps schools open during Atlantic storms that would close districts elsewhere. The 2020 Snowmageddon event in St. John’s — 95 cm in 24 hours — was an exception that required a multi-day provincial state of emergency.

Not always. In Quebec, the French CSS (Centres de services scolaires) network and the English School Boards (EMSB, Lester B. Pearson, Sir Wilfrid Laurier, Riverside, Eastern Townships, Western Quebec, Central Quebec) are governed separately and make independent closure calls. In New Brunswick the Anglophone and Francophone district systems operate the same way. Our predictor tunes to both networks where they cover the same area.

Yes — the territories have a fundamentally different operating model. Most Nunavut communities have walking-distance schools with no bus system, so closures hinge on whether students can safely walk in blizzard conditions rather than whether buses can run. Yukon and the Northwest Territories operate through −40 °C as routine, and ice fog, polar night, and blizzard warnings drive most closure decisions. A southern Canada model would massively over-predict closures for the North.

Lake-effect snow forms when cold air crosses warmer lake water. Bands set up downwind of Lake Huron, Georgian Bay, Lake Ontario, and Lake Erie and can deposit 30–40 cm in a narrow corridor while the next town over gets nothing. Our predictor pulls hourly forecast data at your exact coordinates rather than averaging across a wide area, so a Barrie or Owen Sound lake-effect band shows up correctly even when the rest of the GTA is dry.

Atlantic nor’easters deliver heavy snow plus sustained 70–100 km/h winds, which is a different operating challenge than a quiet inland snowfall. Halifax Regional Centre for Education uses its app to pre-announce closures the night before for confirmed major storms — a practice you do not see in most other provinces. New Brunswick, PEI, and Nova Scotia coastal districts also factor in Confederation Bridge and ferry closures that effectively cut off entire regions.