Summit Public School: Sierra Snow Day Calculator
Will Summit Public School: Sierra close tomorrow? Check the odds.
Powered by NOAA / National Weather ServicePowered by NOAA / National Weather ServiceWill Summit Public School: Sierra close tomorrow? Check the odds.
Powered by NOAA / National Weather ServiceSummit Public School: Sierra is a school in Seattle, Washington, part of Summit Public School: Sierra. 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 Summit Public School: Sierra are almost always made at the district level. If Summit Public School: Sierra closes, this school closes with it, so the district-wide forecast is usually the number that matters (see the Summit Public School: Sierra forecast).
Urban districts usually have the best-treated roads and the shortest bus routes, so they tend to hold out longer before closing. They also weigh sidewalk conditions and transit reliability for students who walk or ride public transport.
Washington averages about 7 inches of snow per year. Seattle and Puget Sound districts close aggressively — even 1-2 inches causes widespread closures due to steep hills and limited salt reserves.
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 Summit Public School: Sierra before acting on it.