The schools are loathe to cancel school, to avoid having to cut into spring and summer vacations to fulfill the required 184 school days. A half day still counts toward them.
For Tuesday’s big snowstorm the schools dismissed early. Was that the right call? Do the kids really get anything done that day? It was already snowing, so letting the kids out early didn’t prevent parents and buses from driving in it. If they’re going to drive in snow anyway, why not let the kids stay in school all day.