As the central United States weather pattern transitions from northwest flow to a more zonal or slightly southwest flow in the next few days, corn earworm migration risks will be on the increase with the expected return of southerly winds to much of the region. Low migration risks are predicted generally west of a Springfield, Missouri to Wausau, Wisconsin line Thursday night into Friday and then west of Lake Michigan Friday night into Saturday morning. Thereafter, as south to southwest winds and precipitation chances increase, a Moderate corn earworm migration risk is predicted for portions of Kansas, Nebraska, Iowa, Minnesota, and Missouri Saturday night into Sunday with Low risks as far east as Ohio and Michigan. Low risks continue into eary next week primarily south of I-90. Growers all across the corn-growing region but especially west of Lake Michigan should monitor their crops for isolated to scattered moth flights in the next week.