Nationwide Winter Blast Packs a Brutal Punch

The storm spans more than 30 states, and is affecting 120 million Americans.
2:33 | 03/04/15

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Transcript for Nationwide Winter Blast Packs a Brutal Punch
We do move on now, anded to the never ending winter. A new blast of snow and ice, 30 states, 120 million Americans under winter weather alerts at this hour, from Denver to little Rock to Boston tonight, making for a dangerous commute home yet again. Look at the pictures. This car spinning out on a highway in Chicago. Unreal there. In Minnesota tonight, gridlock. Dangerous crashes. Meteorologist rob Marciano is in Boston tonight, where they are now inches away from an all-time record. He has the storm track. But first, ABC's Alex Perez from Minnesota. Reporter: Stretch routreacherous ice and slick conditions bringing I-95 in Minnesota to a standstill, after two dozen Carls in the area. Near St. Paul, one police vehicle slammed by a car as the officer investigates another crash. Strong winds, the problem in watertown, South Dakota, 40-mile-per-hour gusts. And look again at this scary scene during the morning commute in Chicago. One driver losing control, nearly slamming into not one, but two cars. At least 30 states under winter weather alerts today. The storm dumping snow, ice and rain from Utah to Louisiana to Maine. In hard-hit Boston, where they could break their all-time record for snowfall tonight -- Coast guard called 911. Reporter: A special dive team had to be called to help free this coast guard cutter that got stuck in the harbor while clearing ice. Back in the midwest, blinding snow and slippery roads in parts of Michigan and Indiana causing spinout after spinout. I just completely turned all the way around and slid off the record. Reporter: And here in Minneapolis, they are coping with the snow, ice and cold, but already looking forward to the weekend, when temperatures could rise above 40 degrees. David? Alex, thank you. Let's get right to rob Marciano, right there in Boston tonight. We could have guessed that you'd be back in Boston. Rob, where is this thing tonight? Where is it headed? Reporter: Well, it's a long and wide system, David. The advisories that you mentioned, about 30 states stretching all the way back to Salt Lake City. So, let's look at that. Beneficial snows there, but this moisture is going to be hitting southern states once again. Hard to believe we're in the month of March. Here's the radar. A good thump of snow right now into New York and Boston. Then we move the map to the west. Tomorrow morning, Wichita to Denver, you'll get snow. The cold air will meet some of this moisture. Memphis up to me due Ya. Some heavy snow is expected across parts of Cincinnati. It pushes into D.C., philly and New York with significant snopes, I think, happening Thursday morning. How much snow do we see? Four to eight inches in many spots. Could see up to a foot in some spots.

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

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