We are under the same watch with the same degree of uncertainty, and as far as I know it's supposed to all have blown over by Monday, so at the worst you would just have to stay until then? I mean, if that wouldn't be a cause of unnecessary drama, it doesn't sound terrible for Alex to have an extra day with Grandma.

Still, a five hour drive in bad weather with a small child is nothing to shrug off, so I don't really know what to tell you. It would be a shame if you had to cancel.