My mistake, I had bad info, I had heard that the problem was more of the pilots landing safely in bad conditions. I stand corrected.
We had just heard that a child was killed. The thread chilled.
On a related note, Southwest's crisis management team is currently scheduled to arrive at ORD at 12:39 AM CST. It'll show on flightaware.com as flight number 8804, leaving Dallas-Love at 11:00 PM. If there are any Chicago-area planespotters who want to brave the blizzard, this would be a good chance to get a rare shot of a Southwest plane at O'Hare.