Winter storm could cause travel disruptions nationwide

If you're traveling by air this week, get ready for delays, disruptions and cancellations.

A winter storm that made driving dangerous in the Pacific Northwest and canceled about 200 flights in and out of Seattle's airport on Tuesday is just getting started. The system is lining up to bring crippling snow and frigid temperatures to major Midwestern airport hubs in cities such as Detroit, Minneapolis and Chicago.

About 165 million Americans are in the path of the winter weather hitting just before Christmas that will dump snow in the Midwest and head as far south as Texas. About 113 million people are expected to travel for the holidays.