A cool front is expected to continue to push slowly to the southeast over the next couple of days, and should eventually reach into the Ohio River valley by late this week. South to southwest winds to the south of the front along with scattered to widespread precipitation may lead to some isolated corn earworm migration events especially along and southeast of a line from near Wichita, Kansas to Chicago, Illinois overnight tonight into tomorrow morning. Virtually the same risk area is in the forecast tomorrow night into Thursday morning, but just focused a little further south. A break in the migration risk is then predicted on both Thursday and Friday nights as northwest flow dominates the weather across much of the corn-growing region. Low risks are back in the forecast by Saturday night into Sunday morning, however, as southerly winds return the Plains states and western Midwest ahead of the next developing low pressure system.