Will school be cancelled tomorrow? Enter your city or postal code — we fetch live weather data anywhere in the world — snowfall forecast, overnight temperature, and wind speed — then calculate your exact school closure probability.
Snowfall is the primary driver. The algorithm scores accumulation on a curve — the first few centimetres matter most. 5cm scores ~20 pts. 15cm scores ~40 pts. Beyond 20cm, schools are almost universally closed. Timing also matters: snow during the evening creates more chaos than afternoon snow.
The biggest hidden variable. For US locations, the algorithm detects the state and applies regional multipliers. Southern US states get a 2.5–3.2× multiplier due to lack of plowing infrastructure. Northern states (MN, WI) get 0.6–0.8× — they handle 25cm before closing. For international cities, climate-based tolerance is applied.
Extreme cold turns roads to black ice. The algorithm adds up to 20 bonus points when temperatures drop below −10°C — even 2cm of snow becomes catastrophic. High winds add up to 10 bonus points for reduced visibility and wind chill making outdoor waiting dangerous for children.