Marsh Valley Joint School District 21 snow day calculator
Will Marsh Valley Joint School District 21 close tomorrow?
District facts
- Official name
- Marsh Valley Joint School District 21
- Schools
- 6
- Grades
- pre-K to grade 12
- Office
- Arimo, ID
- Snow a year
- 45 in. · 6.0 days with 3+ in.
- NCES ID
- 1601950
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 Marsh Valley Joint School District 21 closed, delayed or opened) from parent reports. The first days appear here this winter. Report today's decision.
What it takes to close Marsh Valley Joint School District 21
- Snow line
- About 9 in. of overnight snow
- Ice line
- About .19 in. of ice
- Cold line
- −28°F wind chill at bus time (normal winter low 17°F)
- Counties
- Bannock County, Power County, Caribou County, Franklin County
Levels where a closure becomes likely in our model for ZIP 83214, from Marsh Valley Joint School District 21's local snow normal: 6.0 days a year with 3 or more inches. Snow varies across the district: its ZIP codes average from 30 to 52 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 |
|---|---|---|
| Pocatello School District 25 | 30 in. | 6 in. |
| Oneida County School District 351 | 52 in. | 9 in. |
| Preston Joint School District 201 | 52 in. | 9 in. |
| American Falls Joint School District 381 | 35 in. | 6.5 in. |
| Bear Lake County School District 33 | 91 in. | 11.5 in. |
| Blackfoot School District 55 | 15 in. | 5 in. |
ZIP codes Marsh Valley Joint School District 21 serves
83204, 83214, 83234, 83241, 83245, 83246, 83250, 83281
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.
Marsh Valley Joint School District 21 snow day questions
Is Marsh Valley Joint School District 21 closed tomorrow?
The card above shows tomorrow's chance that Marsh Valley Joint School District 21 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 Marsh Valley Joint School District 21?
There is no fixed number: the district weighs snow totals, ice, wind chill, road crews and timing. Our model treats about 9 inches of overnight snow as the level where closures become likely around ZIP 83214, which averages 45 inches of snow a year (NOAA 1991–2020 normals).
When does Marsh Valley Joint School District 21 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.