© AP/Rick BowmerTravelers surround the ticket windows at Portland International Airport Tuesday, Dec. 23, 2008, in Portland, Oregon.
Chicago - Hundreds of holiday travelers spent the night in the nation's second busiest airport and others faced delayed or canceled flights and highways choked by snow and ice as storms kept up their assault on northern states.
More snow fell Wednesday in the Midwest, where the National Weather Service said up to 4 inches was possible in Chicago. The Northwest faced more snow and sleet early Wednesday, with up to 20 inches possible in the Cascade range. And more snow and ice spread over the Northeast.
"We're seeing quite a bit of messiness out there," said weather service meteorologist Ed Shimon, who's been at work at the agency's Lincoln, Ill., office for six straight days, a period when the state has seen snow, ice and subzero temperatures. "It's something different every day - never a dull moment."