Heavy snow blankets northern and central Ontario with totals generally in the 18–25 cm range by sunrise, backed by brisk winds 40–60 km/h and continued light-to-moderate snowfall through the morning. Areas from Hanmer and Lively through Sudbury and Parry Sound are seeing persistent snowy regimes—a pattern we’re calling Northern Storm Systems in the north and widespread lake-effect influence toward the central belt. With mornings expected to be slick and school transport disrupted in many districts, plan for delayed starts or bus cancellations in higher-accumulation zones and get the kids ready accordingly. Though winds aren’t reaching blizzard thresholds, snow totals combined with gusty winds will impact the morning commute across impacted regions.
Stop relying on outdated “magic number” calculators.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 In a fast-moving winter storm, that data is obsolete before you even wake up.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.