Morning CME Globex Update:July corn is down 10 cents, July soybeans are down 9 1/2 cents, and July Chicago wheat is down 9 1/4 cents. Grains were lower in the overnight session, pressured by an outlook of slow world growth in 2013 and growing concerns about bird flu in China. This morning finds snow falling again in South Dakota and rain in Nebraska and Kansas. Cold temperatures continue to threaten the winter wheat crop with temperatures in the low 20s expected in western Kansas on Tuesday and as far south as northern Texas on Wednesday morning. .