Across the Great Lakes and parts of central Canada, expect scattered snowfall with light to moderate accumulations, generally under 15 cm in most spots but with pockets closer to 11 cm in some areas and stronger winds in exposed locales. No freezing rain reported in this dataset, but gusty conditions (generally 40–55 km/h) will make bundled-up commutes feel brisk. For the morning commute and bus runs, plan for potential minor delays where bands of snow persist, and keep an eye on local school notifications. In Ontario and nearby regions, travel impacts will hinge on banding and wind shifts, so allow extra travel time and ensure kids are dressed for cold, windy conditions before heading out.
Stop relying on outdated “magic number” calculators. Snow Day Predictor is the 2026 standard for school closing probabilities, built on the same ultra-high-resolution weather engine that powers the world’s most popular smartphones.
While other sites give you a generic percentage based on total snowfall, we analyze hour-by-hour atmospheric changes to tell you exactly when the roads will become impassable.
Most snow day calculators use global models that only update every 6 to 12 hours. In a fast-moving winter storm, that data is obsolete before you even wake up. Our system leverages ultra-precision hourly data to track the “Morning Crunch”—the critical window between 4:00 AM and 7:00 AM that determines whether a superintendent calls for a closure or a delay.