Delay or closure
Two-Hour Delay Calculator: delay or closure?
Enter the expected snow, when it starts and ends, ice and the morning cold to see whether a two-hour delay or a full closure looks more likely, and why.
Delay or closure?
Closure risk is low and delay risk is moderate.
Why
- Snow: about 3 in in total (3 in before 6 am), which the model weights by timing to 2.6 in for a closure and 2.1 in for a delay. For an area that sometimes gets snow, a closure reaches the midpoint of the scale at about 6 weighted inches and a delay at about 3.
- Cold: a wind chill near 16 °F is cold but below the level the model treats as a reason to close.
This is a rough estimate from a simple rule-of-thumb model, not a prediction and not a school decision. The scores are not probabilities and have not been tested against real closures. Districts set their own rules, so confirm with your district.
Checking a ZIP code converts it to approximate coordinates in your browser, using a table on this site, and sends those rounded coordinates to the National Weather Service for its forecast. Nothing you enter is stored, and there is no account. This is an independent estimate from a simple model, not a prediction and not an official decision. It is not affiliated with any school or district. Confirm closures and delays with your district.
How to use the two-hour delay calculator
Enter the snowfall you expect, choose when the snow starts and when it ends, then add ice, the overnight low and the wind. The calculator compares a delay with a full closure for that morning and tells you which looks more likely in the scenario, along with the reasons.
The start and end times matter most here. Snow that ends in the middle of the night leaves time to plow. Snow that keeps falling through the 6 to 9 am commute is the classic reason for a delay or a closure.
What separates a delay from a closure
Districts describe a delay as a way to buy time. Stoughton Area School District in Wisconsin, for example, uses two-hour delays for winter weather and lists later start times, such as 9:45 a.m. for elementary schools. A district may also decide again later: a delay can become a closure if conditions get worse.
A delay helps when the problem is clearing roads or sidewalks in the morning. It helps less when snow keeps falling during the day, when ice will not melt, or when the cold lasts all day.
- Delay: snow or ice near the start of the school day, with roads that crews can clear in a few hours.
- Closure: heavy or continuing snow, a thick coating of ice, or a risk that lasts all day.
- Neither: little snow, snow that ended long before the buses run, or an area that handles that much routinely.
What the calculator assumes
It uses the same model as the home page, with snow near the morning commute counting more toward a delay than earlier snow does. If your district does not use delays, read a high delay band as a sign of a disrupted morning, and focus on the closure band.
Delay start times, and whether breakfast is served on a delay day, vary by district.
Common questions
Does every district use two-hour delays?
No. Many do, but some go straight from open to closed, and some use other delay lengths. Your district’s website shows what it uses.
Why can a delay be more likely than a closure?
When the main problem is roads that need a few hours to clear, a delay solves it. Closures are more likely when the problem will last all day.
Can a delay turn into a closure?
Yes. Districts may reassess later in the morning if conditions worsen, so check for updates.
The studio notebook
A useful place to begin.
Clear steps, considered details, and ideas you can put to use.
How much snow closes schools? It depends where you live
There is no national number. Here is why the same snowfall closes schools in one place and not another, and how the calculator’s snow-tolerance setting reflects that.
How school districts decide on snow days, and when you hear
Who makes the call, how early it happens, how families are notified, and what a two-hour delay changes, using published policies from real districts.
Snow days vs remote learning days: what changes for families
Some states let districts hold school online instead of closing. How a remote day works, what limits apply, and how to read a closure announcement.
Extreme cold and wind chill: when cold alone closes schools
How wind chill is calculated, what the National Weather Service cold alerts mean, and why there is no single wind chill at which schools close.
How the Snow Day Calculator works, and what it cannot know
The forecast source, the scoring rules and their limits, written out so you can judge the result for yourself.
The night before a possible snow day: a parent’s checklist
What to check in the forecast, which alerts matter, and how to be ready for a delay, a closure or a remote day.