An active and rather progressive weather pattern very typical for September is expected across much of the corn-growing region in the next week. The result will be a couple of opportunities for isolated corn earworm migration events to occur especially over portions of the Plains and western/upper Midwest region. The first isolated migration event is predicted overnight tonight into Friday morning as a cold front advances southeast rather quickly through the western and central corn-growing region. Southerly winds in advance of this front in addition to expected precipitation along the front has resulted in a Low corn earworm migration risk from Kansas and Missouri northeast through southeast Nebraska, Iowa, southeast Minnesota, central and southern Wisconsin, and much of Illinois. After high pressure moves through the central United States this weekend, another weather system is expected to advance east into the Midwest by early next week and a Low migration risk is in place west of Lake Michigan and Illinois, and as far north as the North/South Dakota border into central Minnesota and northern Wisconsin. Growers with crops still at susceptible stages to damage from corn earworm (especially late planted fresh market and processing crops in the upper Midwest and Great Lakes region) should continue to monitor fields for new moths in the coming week.