I know nothing about weather, but aren't changes happening gradually instead of overnight? There's no major anomaly that appears all of a sudden. In which case we can assume the every new change will be incorporated in the AI model's training.
i'd never heard of a storm doing that, but i am not really that in to weather, so it's possible it's in the training data somewhere?
You can get a lot of traction with your assumptions but it's that 2-3% of predictions where being accurate matters a lot.