Brian and Judy
Our dojo rarely cancels classes due to snow - even in the mornings! If we are having blizzard conditions and you are wondering if classes will be canceled, then you probably shouldn't be driving and should just stay home and use the time to practice some weapons kata.
Our dojo phone message will not give you information on cancellations. Some instructors will post a note on the blog if they are canceling classes due to snow, or they may give you their cell phone numbers so you can check with them directly. Check with your instructors to see how they will handle snow emergencies in the classes they are responsible for, but, in general, just use common sense and err on the side of safety.