I just sent this to all students: 
Just looking at the snow coming down as steadily as it  is and also looking at the weather reports, I don't think it's smart to go out  in this weather.
I am going to cancel class today because I think they  will cancel it anyway.
I will call the school and see if we can get a classroom  for tomorrow. If too many people can't make it tomorrow, then possibly next  Saturday or by adding an hour on to each class for next week.  Another  possibility is a  week from this Saturday.
Please click reply and tell me your preference on when  to hold this class.