CSE is a wonderful MSC with great schedulers! I would write to your scheduler and give her (or him) a heads up and ask if you should just go ahead and cancel now so they can see if they can find someone else, or if they want you to wait until tomorrow to see if the forecast changes.
They're very understanding.
I learn something new every day, but not everyday!
I've learned to never trust spell-check or my phone's auto-fill feature.