School Administrative District 40 snow day calculator
Will School Administrative District 40 close tomorrow?
District facts
- Official name
- School Administrative District 40
- Schools
- 7
- Grades
- pre-K to grade 12
- Office
- Union, ME
- Official site
- www.msad40.org
- Snow a year
- 69 in. · 9.1 days with 3+ in.
- NCES ID
- 2311550
National Center for Education Statistics (CCD 2024–25, EDGE GRF25); NOAA 1991–2020 normals. Not affiliated with the district.
Past winter days
We record what happened on each storm day (our chance, and whether School Administrative District 40 closed, delayed or opened) from parent reports. The first days appear here this winter. Report today's decision.
What it takes to close School Administrative District 40
- Snow line
- About 10.5 in. of overnight snow
- Ice line
- About .21 in. of ice
- Cold line
- −30°F wind chill at bus time (normal winter low 15°F)
- Counties
- Knox County, Lincoln County
Levels where a closure becomes likely in our model for ZIP 04862, from School Administrative District 40's local snow normal: 9.1 days a year with 3 or more inches. Snow varies across the district: its ZIP codes average from 53 to 69 inches a year, so the line is higher in the snowier parts. These are model estimates, not the district's policy.
Nearby districts
| District | Snow a year | Snow line |
|---|---|---|
| Regional School Unit 13 | 69 in. | 10.5 in. |
| Regional School Unit 12 | 79 in. | 11 in. |
| Regional School Unit 71 | 72 in. | 10.5 in. |
| School Administrative District 03 | 86 in. | 10.5 in. |
| School Administrative District 11 | 69 in. | 11 in. |
| Regional School Unit 02 | 69 in. | 11 in. |
ZIP codes School Administrative District 40 serves
04547, 04572, 04574, 04862, 04864
ZIP codes that overlap the district's boundary (NCES EDGE GRF25). Some are shared with neighboring districts.
Check a different ZIP
Loading tonight's forecast…
Snow by hour
From the National Weather Service forecast, updated hourly. Estimate only. Your district makes the call.
School Administrative District 40 snow day questions
Is School Administrative District 40 closed tomorrow?
The card above shows tomorrow's chance that School Administrative District 40 closes or delays school, from tonight's National Weather Service forecast for the district's area. It is an estimate; only the district can announce a closure, usually on its website, by text or phone alert, and through local TV and radio.
How much snow does it take to close School Administrative District 40?
There is no fixed number: the district weighs snow totals, ice, wind chill, road crews and timing. Our model treats about 11 inches of overnight snow as the level where closures become likely around ZIP 04862, which averages 69 inches of snow a year (NOAA 1991–2020 normals).
When does School Administrative District 40 announce snow days?
Districts usually decide early in the morning, after crews check the roads, and sometimes the evening before when a big storm is certain. Check the district's official website and alerts for the decision; we don't report official closings.
Guides
- How much snow cancels school?
From one inch in Atlanta to a foot in Buffalo: what it takes in every state, with NOAA data.
- What time are snow days announced?
When districts decide, how they tell families, and when to check the calculator.
- How school districts decide snow days
Who makes the call, what they check before dawn, and why neighboring districts disagree.
- Snow day vs. delay vs. early dismissal
What each one means, when districts use them, and how the calculator scores each.