Hello, I'm Dr. Deb and will do my best to help you today.
I'm so sorry for the troubles you're having ....with both the storm and with your dog.
I know it may sound strange to say so, but most all dogs will eventually urinate when their bladder expands enough. Some patients are able to hold their urine for very long periods of time, often up to 10-12 hours and more although, obviously, this isn't ideal.
If you're not able to leave your house, then I'd closely monitor her for behavior which might be consistent with her need to urinate which would be wandering off from the family, getting ready to squat or perhaps even urinating. Should you see these signs, then immediately pick her up an put her on a pee pad. Lavishly praise her so that she knows that she did a "good" thing but don't punish her if you just find the urine.
Hopefully, the storm will let up soon and/or you'll be able to get out of your house so that you can shovel a path for her.
If you can manage to shovel a small area for her to urinate outside of your house (and it doesn't have to be a large area), then walk her multiple times over the next several hours. When her bladder is full enough and even if she doesn't like the snow, she'll urinate.
I hope this helps and that you both stay safe. Deb