Corn earworm migration will be a possibility, mainly on an isolated basis, overnight tonight into tomorrow morning as a cold front pushes through the eastern corn-growing region and Great Lakes area. Low corn earworm migration risks are in the forecast mainly east of I-57, including far eastern Illinois, extreme southeast Missouri, Kentucky, Indiana, southern lower Michigan, Ohio, and southern Ontario, Canada. No other risks are in the forecast as wind flow is expected to become weaker and more focused in a northwest to southeast direction, at least through the early portions of next week.