1. Severe weather is disrupting one of the busiest travel days of the year.

Two separate storm systems — one in the Northwest and another moving over the Great Lakes — have choked transportation across the center of the nation, bringing 30 inches of snow in some areas and 106 m.p.h winds in others. Many interstates have closed and hundreds of flights are canceled. Above, O’Hare International Airport in Chicago.

The National Weather Service expects the storms to weaken Thursday but continue into the weekend. Here’s the latest.