Major winter storm brings heavy snow to the west

Rain and snow slamming much of the country overnight with millions in the path of dangerous wintry weather.
2:29 | 12/15/19

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Transcript for Major winter storm brings heavy snow to the west
The pair of storms bringing severe weather to huge chunks of the country. As we come on the air, one storm is moving off to sea after impacting the entire east coast, and this is video from Cumberland, Maine, where five inches of rain provoked flooding. Meanwhile down in Florida, the storm spun off a tornado in Elton. This drone footage shows the damage there. And hot on the heels of that storm, here's another one marching across the country. It's been a boon to ski resorts like steam boat, but it's also made a mess on the roads. This is a video from south Dakota overnight, so what's coming next? Let's go to rob. Good morning to you, sir. Still dealing with the very slow-moving, warm storm while the western storm adds a fast mover. It's really not going to give anybody much of a break. Wow. Reporter: This morning, a dangerous storm system marching east, bringing wind and heavy snow across the central plains. In South Dakota, whiteout conditions making it treacherous for drivers on interstate 90. Strong winds blowing across the highway. Several inches falling so far. In the northeast, lake-effect snow making travel especially dangerous there. Outside Erie, Pennsylvania, this driver sliding off the on the coast, downpours drenching Boston, forcing some drivers onto sidewalks to avoid flooded streets. In the south, severe storms striking Florida. An ef-1 tornado tearing through the town of elkton, winds of up to 110 miles per hour. I heard it coming. Reporter: Trees uprooted, roofs peeled off. This business left in shreds. The damage stretching for 20 miles. And there will be more in the way of severe weather from this next storm which also has cold air with it. A number of winter storm warnings now have been posted, includes the rocky mountains of Colorado and northern parts of New Mexico. Winds all the way back to southern California by the way. Now Kansas City through St. Louis, winter storm warnings posted there. A little bit of ice to this I think south to I-70. Let's time it out for you as this low moves quickly. Here's where the ice is, Springfield, Missouri. St. Louis will see mostly snow as will Indianapolis. I-70, really the marking point where north of that will be snow, and then it gets a little bit dicey into the northeast. See how fast it moves? By Monday night, we'll have serious travel delays here, not only on the roads, but in the airports and that strong severe weather event looks to be coming Monday as well. Big winds, hail, and could see tornadoes New Orleans through Jackson, Mississippi.

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

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