This map shows approximately how much snow it takes to cancel school in various parts of the United States.

Map from Reddit user atrubetskoy.

The map’s author explains the methodology:

“[It’s from a] combination of a /r/SampleSize survey, threads, NOAA maps and some other local news sources.”

So while it may not be the most precise or reliable data, it’s still an interesting general look at snow closure patterns around the country.