About SnowCall

SnowCall is an independent snow day calculator built for parents, students and teachers who want an honest, explainable estimate instead of a black box. We publish our formula, show the forecast behind every number, and never claim accuracy we have not measured.

Data sources

• Weather forecasts: Open-Meteo (CC BY 4.0), including GFS, ECMWF, ICON and GEM model output.
• US forecasts and alerts: National Weather Service API.
• ZIP code lookup: Zippopotam.us.
• Climate summaries: ERA5 reanalysis via the Open-Meteo historical API.

Corrections

If something on a district page is wrong, or you know your district's closing policy, tell us and we'll review it: hello@snowdaycalculator.school.

Not affiliated

SnowCall is not affiliated with any school, school district, government agency or weather service. District names are used only to identify the places our forecasts describe.