This is NBC Nightly News with Joseé Diaz Bolard. >> Good evening. We begin tonight with 20 million of us bracing for bitter cold and a new round of wintry weather.This was a scene in Utah overnight. Snow plows already working overtime to clear roads during a triple threat of strong winds, heavy snow, and icy conditions. But it wasn't just there.You could see it really coming down across much of the Mountain West as that system moved east. And in the Midwest tonight, temperatures plummeting. So cold it even ...