Mountain City, Tennessee, 4,788 students in 8 schools

Johnson County School District Snow Day Predictor

Q: How much snow does Mountain City get?

About 9.3 inches a winter at a NOAA weather station under a mile away, averaged over 10 winters. Between December 1 and March 31 that brings 1.1 weekday mornings a year with 2 inches of new snow or more, and 0.2 with 4 inches or more.

Q: What was the biggest snow day near Johnson?

5.5 inches on December 9, 2018, the largest single day at a NOAA weather station under a mile away in 10 winters. The snowiest winter was 2025 to 2026, with 20.7 inches.

Q: Does Johnson get more snow days than other Tennessee districts?

Johnson averages 0.2 weekday mornings a winter with 4 inches of new snow or more, more than 60 percent of the 106 Tennessee districts with a station record.

Q: How does the Johnson snow day predictor work?

It reads the National Weather Service forecast for Mountain City through the night and the 5 to 8 am bus run, adds winter alerts and the Winter Storm Severity Index, and measures the snow against Johnson’s own big snow morning: 2.8 inches, the top tenth of snowy weekday mornings at a NOAA weather station under a mile away.

The odds of a closing or a delay on the next three school mornings in Johnson, measured against Johnson's own big snow morning of 2.8 inches.

The next three school mornings

Will Johnson close tomorrow?

Reading the National Weather Service forecast for the overnight and the bus hours in Mountain City.

Ten winters of school mornings

Johnson’s snow record

9.3inches of snow a winter

1.1school mornings a winter with 2 in of new snow or more

0.2with 4 in or more

2.8 ina big snow morning in Johnson: the top tenth of snowy school mornings

1.1school mornings a winter at 0 F or colder

More 4 inch school mornings than 60% of the 106 Tennessee districts with a station record.

0.5Nov

1.3Dec

5.9Jan

1.2Feb

0.4Mar

Average snowfall by month, inches

Biggest day 5.5 in on December 9, 2018
Snowiest winter 2025 to 2026, 20.7 in
6 in mornings 0 a winter
1 in mornings 2 a winter

Measured at a NOAA weather station under a mile 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.

The Tennessee rule

How Tennessee counts a lost day

Tennessee requires at least 180 days of classroom instruction, with a 6.5 hour instructional day. A district that runs a half hour longer than the required 6.5 hour day all year banks the extra time as up to 13 stockpile days, which can cover days lost to dangerous or extreme weather.

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

Next door

Districts near Johnson

District	Snow a winter	4 in mornings
Bristol City School DistrictBristol	7.7 in	0.1
Carter County School DistrictElizabethton	5.8 in	0
Sullivan County School DistrictBlountville	7.4 in	0
Johnson City School DistrictJohnson City	5.8 in	0
Washington County School DistrictJonesborough	4.8 in	0.2
Kingsport City School DistrictKingsport	3.4 in	0

The schools

8 schools

Every school in Johnson follows the district’s call: one closing covers them all.

High

Tennessee Connections Academy Johnson County 9-12, White House
Johnson Co High School

Middle

Tennessee Connections Academy Johnson County 4-8, White House
Johnson Co Middle School

Elementary

Mountain City Elementary
Roan Creek Elementary
Doe Elementary
Laurel Elementary, Laurel Bloomery

Questions

Johnson snow day questions

How much snow does Mountain City get?

What was the biggest snow day near Johnson?

Does Johnson get more snow days than other Tennessee districts?

How does the Johnson snow day predictor work?

How does Tennessee handle snow days?

More winter

More for Tennessee 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.Tennessee winter forecastThe season ahead for Tennessee: 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.