Test Your Own Snow Day Scenario
Use this tool to test different weather scenarios manually. For an automatic live forecast, use the Snow Day Predictor.
Manual Snow Day Calculator
Use this when you want to test a specific situation rather than rely on tonight's live forecast, for example, checking how a storm arriving four hours earlier would change your estimate, or estimating a college campus scenario where the automatic tool's defaults don't quite fit.
This is especially useful in three situations. First, college and university students and staff, since higher education institutions typically set a different bar for closing than K to 12 districts, and this tool lets that be reflected directly rather than guessed at. Second, anyone in an area with limited automatic forecast coverage. Third, anyone who wants to understand which single factor matters most, since changing one variable at a time shows exactly how much that shifts the estimate.
Results here are estimates based on the same regional and factor weighting used by the main predictor, not a separate or more authoritative model, and not a statistically validated probability. Always confirm actual closures through your school's official channels.
How is this different from the main snow day predictor on the homepage?
The homepage tool pulls live forecast data automatically for your location. This tool lets you manually enter your own numbers to test a specific scenario instead.
Can I use this for a college or university?
Yes, and it's specifically useful here, since college closure thresholds often differ meaningfully from K to 12 districts in the same city.
Does this tool use different data than the main predictor?
No. It uses the same underlying model and regional weighting, just with numbers you provide instead of a live forecast pull.
Is the result a real probability?
No, it's labeled as an estimated likelihood rather than a statistical probability, since the model has not yet been validated against a full season of real closure outcomes. See the methodology page for exactly how the estimate is built and its current limitations.
Related reading: See the full methodology and data sources behind these calculations, or take the snow day knowledge quiz to test your instincts. For a live forecast-based result, try the SnowDay Score predictor.