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Crystal Lake, Illinois, 5,340 students in 5 schools

Community High School District 155 Snow Day Predictor

The odds of a closing or a delay on the next three school mornings in Community High School District 155, measured against Community High School District 155's own big snow morning of 3 inches.

The next three school mornings

Will Community High School District 155 close tomorrow?

Reading the National Weather Service forecast for the overnight and the bus hours in Crystal Lake.
Ten winters of school mornings

Community High School District 155’s snow record

26.7inches of snow a winter
2.8school mornings a winter with 2 in of new snow or more
0.6with 4 in or more
3 ina big snow morning in Community High School District 155: the top tenth of snowy school mornings

More 4 inch school mornings than 52% of the 788 Illinois districts with a station record.

2.8Nov
3.8Dec
9Jan
6.6Feb
2Mar
Average snowfall by month, inches
  • Biggest day 8 in on January 19, 2019
  • Snowiest winter 2018 to 2019, 51 in
  • 6 in mornings 0.1 a winter
  • 1 in mornings 5.8 a winter

Measured at a NOAA weather station 3.4 miles away. Mornings are the 7 am snow reading on a weekday from December 1 through March 31, over the ten winters from 2016 to 2017 through 2025 to 2026, from NOAA GHCN Daily.

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The Illinois rule

How Illinois counts a lost day

Illinois requires a calendar of at least 185 days to guarantee 176 days of actual student attendance, each of at least 5 clock hours. The extra calendar days are emergency days used first; after they are gone, the State Superintendent may excuse days lost to an act of God or a hazard beyond the district's control without cutting state aid.

The Illinois rules in the agency’s own words, and every Illinois district

Next door

Districts near Community High School District 155

DistrictSnow a winter4 in morningsBuilt in days
Crystal Lake Community Consolidated School District 47Crystal Lake29.1 in0.4
Community Unit School District 300Algonquin26.7 in0.65
Huntley Consolidated School District 158Algonquin26.7 in0.6
McHenry Community Consolidated School District 15Mchenry24.3 in1
Wauconda Community Unit School District 118Wauconda35.5 in1
Barrington Community Unit School District 220Barrington25.4 in0.8
The schools

5 schools

Every school in Community High School District 155 follows the district’s call: one closing covers them all.

High

  • Crystal Lake Central High School
  • Cary-Grove Community High School, Cary
  • Crystal Lake South High School
  • Prairie Ridge High School
  • Haber Oaks Campus
Questions

Community High School District 155 snow day questions

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More winter

More for Illinois snow days

Snow day predictorClosing and delay odds for any ZIP, with the snowiest districts in the country.Snow depth mapHow much snow is on the ground right now, measured, across the country.First snow datesWhen the first measurable snow usually lands where you live.Frozen pipesThe nights cold enough to freeze a pipe, and what to do before one.Snow plow trackerWhere the plows are during a storm, city by city.Illinois winter forecastThe season ahead for Illinois: snowfall, cold and the first snow.
A residential street under deep snow on a bright blue morning, cars parked along the curb buried into smooth white mounds, one set of tire tracks down the middle
The morning after a big one: cars buried to the mirrors and one set of tracks down the middle. A street like this is a closing, no debate. Photo, Fairfax, Virginia, January 2016: Jarek Tuszyński, CC BY 4.0

The odds are a forecast read, and the superintendent makes the call: the district’s own announcement is the one to follow.