They don't cancel because of the snow unless it's extremely bad above like 5 inches, what temperature is it there? anywhere from 26-30 Fahrenheit (-1 Celsius) causes liquid to freeze rapidly, which makes it hard for the bus drivers to get children, and morely they school districts to trust the bus drivers to even drive the kids. And high schools since most 16+ kids are driving. So, yeah, it's more of the road conditions.