I live in Texas and if they even think there is a possibility of snow or ice, school is canceled LOL! I grew up in Minnesota though and like Daniele, school was almost never canceled. One time we had a blizzard which dropped 29" in a day, and all that happened was we went to school 2 hours late.
I can see where you'd be getting cabin fever with all of your kids home! I work and I do sometimes envy moms who get to stay home with their kids, but I also know they have it harder for certain things. Staying home and working both have their pros and cons. I hope the kids get back to school tomorrow!