A cold front will push from northwest to southeast across the corn-growing region over the course of the next 3-4 days. High pressure currently located in the Great Lakes region will shift off to the southeast, allowing south to southwest winds to expand east from the Plains into the Midwest. These south to southwesterly winds may pose an isolated corn earworm migration threat especially given their expected strength at flight level above the surface, so a Low migration risk is in place tonight into tomorrow morning mainly west of Lake Michigan and generally north of I-80 into the upper Midwest and eastern Plains states. The risk shifts further east tomorrow night into Saturday morning and reaches as far as southwest Michigan and northern Indiana. By Saturday night into Sunday, the front will continue to move east through the Great Lakes region and portions of the eastern Midwest but is expected to dampen out and southerly winds to its east are not expected to be as strong, thus no migration risk is predicted beyond Saturday morning. Any fresh market and processing growers that still have crops at susceptible stages to damage and located especially in the upper Midwest and western Great Lakes region should continue to monitor their fields through the weekend and take appropriate action, if needed.