Snow Day Calculator
Estimate a playful school-closure probability from forecast snow, overnight low temperature, wind, and whether snow falls overnight. For fun—not official district policy.
FAQ for this calculator
- Is this official?
- No—districts decide independently using roads, buses, and safety rules.
- Why overnight snow?
- Overnight accumulation can affect morning plowing and bus routes in this playful model.
- Can probability hit 100%?
- It caps at 99%—real closures still depend on local decisions.
- What units?
- Snowfall in inches, temperature in °F, wind in mph (U.S.-style inputs).
How to use the snow day calculator
A weighted score blends snowfall depth, cold temperatures, wind, overnight timing, and heavy-snow bonuses into a 0–99% probability.
- Enter forecast snowfall in inches.
- Add overnight low and wind speed.
- Check overnight snow if accumulation happens while sleeping.
When to use this calculator
- Kids checking the night before a storm.
- Teachers joking about lesson-plan backup days.
- Comparing two forecast scenarios quickly.
Examples & walkthrough
- 4" snow, 28 °F low, 10 mph wind, overnight checked → moderate probability.
- 10"+ snow with sub-freezing lows pushes verdict toward likely or very likely.