Mm, we had a 4 on the Fujita scale in November and we didn't get out of school. Many homes were utterly devastated. There was a golf course which was almost entirely engulfed by the storm. Too bad there are so many trees and shit ...I wish I could have seen a good video of it. My uncle took a good picture of it though, thing was fucking huge - from miles away it looked so big even.
Apparently it takes, on average, two and a half hours to shutdown a school. If ti doesn't start snowing during the schoolday, then we have no chance. Teachers are too lazy.
Some schools around here get closed when there's .5 inches of snow :P.
We could have 18 inches of snow here and the school wouldn't close (its happened). The buses dont run if it is below -40 C, and only once did the school not open, because it was -55 C (-67 F) outside with the wind.