Tammany High School Snow Day Calculator
Will Tammany High School close tomorrow? Check the odds.
Powered by NOAA / National Weather ServicePowered by NOAA / National Weather ServiceWill Tammany High School close tomorrow? Check the odds.
Powered by NOAA / National Weather ServiceTammany High School is a high school in Lewiston, Idaho, part of Lewiston Independent District. The forecast above uses the school's own coordinates, so it reflects conditions at this campus rather than an average across the wider area.
Closure decisions for Tammany High School are almost always made at the district level. If Lewiston Independent District closes, this school closes with it — so the district-wide forecast is usually the number that matters (see the Lewiston Independent District forecast).
Rural districts run the longest bus routes over the least-treated roads, so they typically close at lower snowfall totals than nearby urban districts — often on forecasts that would leave a city district open.
High schools start earliest, so they feel a storm before the rest of the district does — the first buses often roll while roads are still being treated. That earlier start time is one reason a district watching a morning storm may call the day off entirely rather than run a delay.
Idaho averages about 44 inches of snow per year. Mountain communities and valley districts have very different closure thresholds. Boise closes less often than northern Idaho.
We score the live forecast at this location against the factors that drive closure calls: snowfall total and intensity, when the heaviest accumulation lands relative to the morning commute, ice and freezing rain, wind chill, and how confident the forecast models are. You get a probability for a full closure, a two-hour delay, and an early dismissal.
This is an independent forecast, not an official announcement. Confirm any closure with Lewiston Independent District before acting on it.