No risk of corn earworm migration is predicted until Thursday night and Friday when a cold front sweeps through the corn-growing region. Southwest winds in advance of this front may result in a short distance isolated migration event especially across the Great Lakes region and portions of the northern/central corn-growing region from Iowa, Illinois, Indiana, Ohio, and points to the north into Wisconsin, Michigan, and southwest Ontario, Canada. The front will be a quick-mover so no further risk is predicted after Thursday night.