St Ann, Missouri, 6,128 students in 11 schools

Pattonville R-III School District Snow Day Predictor

Q: How much snow does St Ann get?

About 12.6 inches a winter at a NOAA weather station 1.6 miles 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 0.3 with 4 inches or more.

Q: What was the biggest snow day near Pattonville R-III?

7.8 inches on January 11, 2019, the largest single day at a NOAA weather station 1.6 miles away in 10 winters. The snowiest winter was 2018 to 2019, with 24.2 inches.

Q: How does the Pattonville R-III snow day predictor work?

It reads the National Weather Service forecast for St Ann 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 Pattonville R-III’s own big snow morning: 2.4 inches, the top tenth of snowy weekday mornings at a NOAA weather station 1.6 miles away.

Q: Can Missouri schools hold a remote day instead?

With a DESE approved AMI plan, hours taught at home on a closure day count as school in session, up to 36 hours a year; lost time after that must be made up.

The odds of a closing or a delay on the next three school mornings in Pattonville R-III, measured against Pattonville R-III's own big snow morning of 2.4 inches.

The next three school mornings

Will Pattonville R-III close tomorrow?

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

Ten winters of school mornings

Pattonville R-III’s snow record

12.6inches of snow a winter

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

0.3with 4 in or more

2.4 ina big snow morning in Pattonville R-III: the top tenth of snowy school mornings

1.1school mornings a winter at 0 F or colder

1.7Nov

1.8Dec

5.2Jan

3.1Feb

0.6Mar

Average snowfall by month, inches

Biggest day 7.8 in on January 11, 2019
Snowiest winter 2018 to 2019, 24.2 in
6 in mornings 0.1 a winter
1 in mornings 2.1 a winter

Measured at a NOAA weather station 1.6 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 Missouri rule

How Missouri counts a lost day

Missouri requires at least 1,044 hours of actual pupil attendance, plus 36 make-up hours built into the calendar for bad weather. A district must make up the first 36 weather hours and half of any hours beyond that, but never more than 60 make-up hours in total; anything past that is excused.

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

Next door

Districts near Pattonville R-III

District	Snow a winter	4 in mornings
Ritenour School DistrictSt Louis	12.6 in	0.3
Ferguson-Florissant R-II School DistrictHazelwood	12.6 in	0.3
St. Charles R-VI School DistrictSt Charles	8.6 in	0.4
Ladue School DistrictSt Louis	11.9 in	0.3
Parkway C-2 School DistrictChesterfield	9.8 in	0.3
Hazelwood School DistrictFlorissant	12.6 in	0.3

The schools

11 schools

Every school in Pattonville R-III follows the district’s call: one closing covers them all.

High

Pattonville Sr. High, Maryland Heights

Middle

Pattonville Heights Middle, Maryland Heights
Holman Middle

Elementary

Robert Drummond Elem.
Willow Brook Elem., Creve Coeur
Bridgeway Elem., Bridgeton
Parkwood Elem., Maryland Heights
Traditional Sch., Maryland Heights
Rose Acres Elem., Maryland Heights

Other schools

PATTONVILLE Early CHol, St Louis
Pattonville Early Childhood, St.ann

Questions

Pattonville R-III snow day questions

How much snow does St Ann get?

What was the biggest snow day near Pattonville R-III?

How does the Pattonville R-III snow day predictor work?

How does Missouri handle snow days?

Can Missouri schools hold a remote day instead?

More winter

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