Crystal Lake South High School Snow Day Calculator
Will Crystal Lake South High School close tomorrow? Check the odds.
Powered by NOAA / National Weather ServicePowered by NOAA / National Weather ServiceWill Crystal Lake South High School close tomorrow? Check the odds.
Powered by NOAA / National Weather ServiceCrystal Lake South High School is a high school in Crystal Lake, Illinois, part of Chsd 155 Schools. 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 Crystal Lake South High School are almost always made at the district level. If Chsd 155 Schools closes, this school closes with it — so the district-wide forecast is usually the number that matters (see the Chsd 155 Schools forecast).
Suburban districts depend heavily on bus fleets covering a wide area of residential streets, which are plowed after main roads. Side-street conditions at 5 AM often decide the call.
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.
Illinois averages about 38 inches of snow per year. Chicago Public Schools rarely close, but suburban and downstate districts close more frequently for lake-effect and prairie blizzard events.
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 Chsd 155 Schools before acting on it.