Arctic Blast Hits At Least 23 States

Temperatures have dropped 30-50 degrees in just 24 hours.
3:00 | 12/04/13

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Transcript for Arctic Blast Hits At Least 23 States
Let's get the latest on the cold blast. Sam and ginger on top of it. This is one of the cold air blasts. Hey, it's winter. Why are we talking about cold ai a city will drop 25 degrees in 24 hours. And get to numbers colder than THEY'VE SEEN SINCE THE '90s. Cold air and snow already in the minneapolis area. But get this. They're 30 degrees right now. They'll go to 2 below by the time we get to friday. That's how powerful this pocket of cold air is. Check the states. Yesterday, we told you we'd have about 25 state where's the winter watches, warnings or advisories are out. Right now, we're at 24. We haven't gotten to the big pocket of cold air in the deep south yet. Quick look at how deep that cold air is expected to go. This is straight from the polar icecap polar express. These are the numbers we expect friday morning. Billings at 23 below. Salt lake city at 8 below. These are real numbers. I wanted to take some time to hand off the board to ginger zee. But she's not here this morning. Where is she? Exactly where you would expect she is, in the middle of the cold air in denver. Ginger, my love, I'm so glad to see you. I wish you were here. But I'm glad you're doing what we do. As am i. And so honored to take it from you, sam. I've learned so much from you, so much left to learn. But there's one thing I know. I love being in it. And I'm in it. The coldest air in the lower 48. It's 7 degrees here. You see denver behind me. Hey, this is only the beginning. It's some of the most bone-chilling air seen this early in 16 years. It's terrible. Reporter: The arctic blast slashing temps across at least 23 states. By 30 to even 50 degrees in just 24 hours. In denver, the high was 56 yesterday. This morning, the temp has plummeted to around 10 degrees. Icy roads in salt lake city, sending two people to the hospital. The back of this pickup truck crumbled after a driver last control. And a tanker in south dakota sliding right off the highway. Whiteout conditions in reno, nevada. This car colliding with an 18-wheeler. No way to escape all that snow. Up to two feet in duluth, minnesota, leaving drivers stranded. Many shoveling around their tires just to get moving. It's wicked, actually. I've never seen it like this before. Reporter: And look at this pickup truck, caught on the side of the road in a colossal snow embankment. The chains are all over the tires in northern california. And even chilling winds in southern california. Temperatures heading into the 20s, THREATENING TO SPOIL CITRUS Crops. The tears that you see coming down my eyes, part of the cold. But of course, on this bittersweet morning, because I'm going to miss you, my friend. Sam, back to you. I'm going to miss you, too. I think I'll talk to you every day. You're actually wearing the hood on the extreme team jacket. I don't think either one of us have gotten the hood on. That's how I know it's cold. Ginger, thank you. I'll see you very soon. We're talking about not just cold air but snow. There's a thursday into friday component that drops snow in the deep south. Louisville, little rock, oklahoma city. Be advised you'll be in the parts of snow as well as northern parts.

This transcript has been automatically generated and may not be 100% accurate.

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