PINE BLUFFS, Wyo. (AP) - A pilot made an emergency landing in a field of wheat stubble Wednesday morning after detecting engine trouble while flying through a winter storm.

William Chase, of Waukee, Iowa, was flying a contract flight for the U.S. Postal Service from Denver to Scottsbluff, Neb., when he was forced to land about 8 miles south of Pine Bluffs in the southeast corner of Wyoming, according to Gerry Luce, a spokesman for the Laramie County Sheriff's Department.

According to Luce, Chase said his carburetor had frozen. Luce said Chase was not injured.

Southeastern Wyoming is on the edge of a blizzard that was moving through Colorado and Nebraska on Wednesday. State highway officials closed portions of Interstate 80 in southeastern Wyoming, and hundreds of flights out of Denver International Airport were canceled.