FAQ’s About Snow Day Predictor

Accuracy depends on how stable the incoming forecast is at the time you check. When a storm is well defined and tracking consistently, the five factor algorithm produces reliable probability scores. Sudden shifts in storm track, timing changes after midnight, or district policies that differ from regional norms can all affect the final outcome. Check between 7 PM and 10 PM the evening before for the most settled forecast data.

You enter your city name, ZIP code, or Canadian postal code and the tool fetches the latest weather forecast from OpenWeatherMap. It then scores five conditions: snowfall accumulation, temperature, wind speed, wind chill, and active storm condition codes. Each factor carries a different weight in the algorithm. The combined score produces a single percentage from 0% to 99% reflecting the weather based likelihood of a school closure the following morning.

The tool analyzes the 3 AM to 9 AM forecast window for your location specifically, which is the period that determines whether school buses can operate safely. Enter your city or ZIP code and the probability percentage tells you whether conditions look clear, borderline, or severe. Anything at 70% or above signals significant winter weather is expected. Always confirm with your school district before making final plans, since the official call is always theirs.

Yes, completely free. No account is required, no sign-up form, and there is no paywall at any point. Enter your city name, ZIP code, or Canadian postal code and get an instant probability score with a full breakdown of the five weather factors behind the result. The tool works on any device through your browser with no download needed.

The algorithm evaluates five weather conditions pulled from live forecast data. Snowfall accumulation carries the most weight at up to 35% of the total score. Temperature follows at 20%, with wind speed, wind chill, and active storm condition codes each contributing up to 15%. The total probability is always capped at 99% because the final closure decision belongs to your school district, not the weather data.

Predictions refresh every hour automatically through a scheduled update that pulls fresh forecast data from OpenWeatherMap. A prediction checked at 8 PM reflects different conditions than one checked at midnight or 5 AM. For the most accurate read on tomorrow morning, check once between 7 PM and 10 PM when overnight models have settled, then again after 5 AM if you want confirmation based on live radar rather than projected forecast data.

The tool uses only the location you type in to fetch weather forecast data for that area. No personal information is collected, stored, or shared at any point. Your location input is used solely to retrieve local weather conditions and generate your snow day probability score. Once the prediction is returned, that location data is not retained by the system.

The percentage reflects how severely the five weather factors combine at your location for the following morning. Below 15% means conditions are clear and schools are expected to open normally. Between 15% and 39% means minor weather is possible but closures are unlikely. Between 40% and 69% means conditions are uncertain enough that delays are genuinely possible. At 70% or above, significant winter weather is expected and a closure or delay announcement from your district is the most probable outcome.

The tool covers thousands of cities across the US and Canada using either pre-stored coordinates for major metros or real time geocoding for smaller locations. If your city is not returning results, try entering your ZIP code or Canadian postal code instead of the city name, since postal codes resolve location data more precisely. If the issue continues, the weather data feed may be mid-refresh, which happens briefly once per hour. Waiting two to three minutes and trying again typically resolves it.