Some Nasty Winter Weather Threatening Millions Of People From Eastern Tennessee Up Toward Boston.
BALDWIN: Look outside your window for me. And if it's clear and sunny, that may be about to change. Some nasty winter weather threatening millions of people from eastern Tennessee up toward Boston. And experts say it could bring historic amounts of snow to some places. Let's go to meteorologist Tom Sater. Tom Sater, hit me.</s>TOM SATER, CNN METEOROLOGIST: This one will. I mean, you and I both spent our time in Washington, D.C. And you know, Brooke, just whispering the word "snow," chaos ensues. I can already hear snowmageddon II. But a blizzard watch is already in effect. This could be historic. And it's possible by the end of the weekend we could see over a million people without power. I'm not kidding here. All of these are winter storm watches in blue and the blizzard watches. They are going to change to warnings a little bit later on today because the storm is approaching. Now, a little bit of snow may leave a dusting to an inch. That's a preview of things to come. Most of the moisture made its way into the western U.S., a storm center now leaving Colorado is going to dive down the south. It really begins tomorrow with the setup of icing into parts of Arkansas into northern Mississippi and areas of western Tennessee. Severe weather south of that in areas of Alabama and Mississippi, maybe tornadoes. But then it kicks in, significant icing in parts of Tennessee across the commonwealth of Kentucky. Icing will start to take the form of maybe a third inch to a half inch in parts of south and North Carolina. That is going to down trees. And then it's the snowfall. Back in all of the areas to the south across the Tennessee and Ohio valleys, but then really picking up as the storm center will change and transfer its energy to an area of low pressure off the coast. Look at the wind gusts. This becomes a nor'easter. Classic nor'easter, 45, 50-mile-per-hour winds in Washington, D.C. You only need 35 for blizzard conditions. It continues, 60-mile-per-hour gusts New York City, 35 to 40. We're looking at high tide with a full moon on Saturday, significant coastal erosion and coastal flooding. But with the icing, with the heavy amounts of snow and wind, power outages. Now, this proof. New York City, we are not really sure right now because computer models which have been in agreement for several days could still vary. There is going to be a significant drop off in New York City. But when it comes to Washington, D.C., records go back to 1884. And hose 132 years there's only been three snow events at 18 inches or higher. And we're looking at the next one. Computer models vary. Some would give us 28 to 30 inches of snow. Another model kicks it up to 20, Brooke. This is going to be significant. So again, it is going to unfold, but each model run will help us get closer to that forecast.</s>BALDWIN: Walked into my office the other day and somebody hung my CNN storm of the century jacket sort in the middle of it. I'm like, guys, are you telling me something? This is my future looks like covering all of stuff? Tom Sater, thank you very much. I know those D.C. days quite well. Still ahead here, Sarah Palin joining Donald Trump on the campaign trail moments ago after her big endorsement of the Republican front- runner. But can she help deliver a victory for him in Iowa? That's the question.