Major winter storm barreling across US

More than 20 states, from California to Illinois, are on alert as some airlines are issuing travel waivers.
2:24 | 01/17/20

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Transcript for Major winter storm barreling across US
Now to that major winter storm barrelling across the country tonight. More than 20 states on alert right now from California to Michigan and then it heads into the northeast. Gusting winds, blowing snow already in the west. This is from Washington tonight. Drenching rain in the bay area, blinding, in fact. Tonight, the cold rain and snow heading east. Philadelphia, New York, Boston in the path. Airlines issuing travel waivers already. We have the track of all this and ABC's Alex Perez is in the storm zone. Reporter: Tonight, that powerful winter storm slamming the west, a white-knuckle whiteout on Washington's interstate 5. Heavy, wet snow knocking trees onto power lines in skykomish. One community cut off for days. Families finally getting supplies from a convoy of good samaritans, but they are not out samaritans -- The trees are heavy, this is a heavy snow. A lot more trees are going to be coming down with the wind. Reporter: North of Redding, multiple disabled tractor trailers shutting down a stretch of interstate 5. In the mountains east of there, rescuers found a woman who was trapped in her snowbound SUV for six days, miraculously alive. Her family says she suffers from dementia. She used floor mats from her car to stay warm. In San Francisco, torrential rain flooding streets and neighborhoods across the bay area. And as the storm barrels east, a separate system bringing heavy rain to the Dallas area, cars stalling during the morning commute. And David, that storm is now moving east. Here in Chicago, we are bracing for a snowy and icy commute on Friday. Parts of the upper midwest are preparing for blizzard-like conditions. Alex, thank you. Let's get right to rob Marciano, tracking this as it moves across the country. Hey, rob. Reporter: Hi, David. Two big players coming together to make for a massive storm. Look at this. California still getting crushed while the southern jet kicks up the action into the Texas panhandle with rain and snow and ice. Denver, you're into a high wind warning tomorrow. Two systems combine for the heaviest show across Iowa, Minnesota and Wisconsin. Chicago, you're in it. This rain/snow line waffles. Accumulations along I-95, with the higher numbers inland. David? Rob Marciano with us again tonight. Rob, thank you. We turn now to the race for the white house and the growing tension between senator

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