A traveler walks through Terminal 3 at O'Hare International Airport in Chicago on Saturday, Dec. 21, 2013. The National Weather Service issued a hazardous weather outlook for north central Illinois, northeast Illinois and northwest Indiana Saturday morning. (AP Photo/Nam Y. Huh)CONCORD, N.H. (AP) — The first full day of iciness introduced a wild mix of climate across the U.S. on Sunday: ice and high wind in the Nice Lakes and New England areas, flooding within the South, snow in the Midwest and report-shattering temperatures in the 60s and 70s alongside the mid-Atlantic.