Low corn earworm migration risks are in the forecast tonight into tomorrow morning from central Iowa into southeast Minnesota, Wisconsin, Illinois, Indiana, and southwest lower Michigan as a weak cool front moves southeast into and eventually through the heart of the corn-growing region. While southerly flow is somewhat weak ahead of this boundary, the persistent nature of the southerly winds over the past several days may lead to some additional isolated moth flights especially just to the east of more concentrated areas of rainfall. The overall wind flow pattern is expected to shift to northwest flow by tomorrow in most areas, so no further migration risks are in the forecast into the weekend. We are monitoring the track of Tropical Storm Gordon, however, and may need some migration risks associated with this system by the weekend depending on eventual track and wind speeds as it moves north into the corn-growing region. There is too much uncertainty at this time distance to include any risks.