That sounds familiar. I'll bet you're talking about the Wisconsin Chickens or other Wisconsin poultry groups on Facebook as usually people here aren't so dramatic.
I was on this thread days ago liking most replies as I too believe the vast majority of chickens are fine if they have dry...
I would see when the time comes first, how bad is the storm is. If an icy wind is blowing into your coop, then I'd shut it for the duration of the storm. Just use your judgment if it's worse to leave it open or not. If it's just a typical snowstorm, I'd leave it open as chickens aren't...