A cold front is predicted to press through much of the corn-growing region over the next few days. Even though the pressure gradient between high pressure in the eastern United States and the cold front/associated low pressure in Canada is weakening, there is expected to be enough south to southwest flow east of the cold front to warrant Low corn earworm migration risks mainly east of a line from Topeka, Kansas to Des Moines, Iowa to north of Milwaukee, Wisconsin and points east into southwest Ontario, Canada and Ohio tonight into Thursday morning and then mainly east of a Saint Louis, Missouri to Chicago, Illinois line Thursday night into Friday morning. Some isolated moth flights may occur in these areas and fresh market/processing growers should continue to monitor their fields for signs of new or active corn earworm. No migration risk is in the extended portion of the forecast for the time being.