Personally, I think it would be too unfair to have every storm dropped on us without any kind of warning considering the damage they do. Plus people are already not liking the storm mechanics as they are now which could cause more frustration. However, I am not completely against the idea of sudden storms. For instance, if a storm suddenly occurs then there would be no damage done to the player, but you could risk the chance of being struck by lightning. I have suggested it before in another thread and I doubt it will ever get implemented, but I think would be funny nonetheless