Dillsburg, Pennsylvania, 3,276 students in 6 schools

Northern York County School District Snow Day Predictor

Q: How much snow does Dillsburg get?

About 21.6 inches a winter at a NOAA weather station 12.2 miles away, averaged over 10 winters. Between December 1 and March 31 that brings 2.7 weekday mornings a year with 2 inches of new snow or more, and 1.5 with 4 inches or more.

Q: What was the biggest snow day near Northern York?

12 inches on March 14, 2017, the largest single day at a NOAA weather station 12.2 miles away in 10 winters. The snowiest winter was 2018 to 2019, with 40.5 inches.

Q: Does Northern York get more snow days than other Pennsylvania districts?

Northern York averages 1.5 weekday mornings a winter with 4 inches of new snow or more, more than 79 percent of the 490 Pennsylvania districts with a station record.

Q: How does the Northern York snow day predictor work?

It reads the National Weather Service forecast for Dillsburg 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 Northern York’s own big snow morning: 5.4 inches, the top tenth of snowy weekday mornings at a NOAA weather station 12.2 miles away.

The odds of a closing or a delay on the next three school mornings in Northern York, measured against Northern York's own big snow morning of 5.4 inches.

The next three school mornings

Will Northern York close tomorrow?

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

Ten winters of school mornings

Northern York’s snow record

21.6inches of snow a winter

2.7school mornings a winter with 2 in of new snow or more

1.5with 4 in or more

5.4 ina big snow morning in Northern York: the top tenth of snowy school mornings

1.4school mornings a winter at 0 F or colder

More 4 inch school mornings than 79% of the 490 Pennsylvania districts with a station record.

0.7Nov

2.6Dec

6.9Jan

6.3Feb

4.9Mar

Average snowfall by month, inches

Biggest day 12 in on March 14, 2017
Snowiest winter 2018 to 2019, 40.5 in
6 in mornings 0.4 a winter
1 in mornings 4.1 a winter

Measured at a NOAA weather station 12.2 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.

The Pennsylvania rule

How Pennsylvania counts a lost day

Pennsylvania requires either 180 days, or hours: 900 for kindergarten through grade 6 and 990 for grades 7 to 12, as the district chooses. The state forgives no days; districts are expected to build make-up days into the calendar for closures beyond any Flexible Instructional Days.

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

Next door

Districts near Northern York

District	Snow a winter	4 in mornings
South Middleton School DistrictBoiling Springs	21.6 in	1.5
Mechanicsburg Area School DistrictMechanicsburg	23.8 in	1.2
Bermudian Springs School DistrictYork Springs	21.9 in	1.5
Cumberland Valley School DistrictMechanicsburg	21.6 in	1.5
Camp Hill School DistrictCamp Hill	23.8 in	1.2
West Shore School DistrictLewisberry	22.4 in	0.7

The schools

6 schools

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

High

Northern HS

Middle

Northern MS

Elementary

Dillsburg El Sch
South Mountain El Sch
Northern El Sch
Wellsville Campus, Wellsville

Questions

Northern York snow day questions

How much snow does Dillsburg get?

What was the biggest snow day near Northern York?

Does Northern York get more snow days than other Pennsylvania districts?

How does the Northern York snow day predictor work?

How does Pennsylvania handle snow days?

More winter

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