Southwest under scrutiny after wave of storm cancellations

Major U.S. airlines were broadsided by the massive weekend winter storm that swept across large swaths of the country but had largely recovered heading into Monday, except for one.

Problems at Southwest Airlines appeared to snowball after the worst of the storm passed. It cancelled more than 70% of its flights Monday, more than 60% on Tuesday, and warned that it would operate just over a third of its usual schedule in the days ahead to allow crews to get back to where they needed to be.

American, United, Delta and JetBlue, suffered cancellations rates of between none and 2% by Tuesday.