An active period of weather is predicted across especially the western and central corn-growing region as a frontal boundary wavers north and south ahead of the main cold front which should pass through much of the corn-growing region by this weekend. South of the front, hot and humid weather is likely but just north of the front, showers and thunderstorms are expected. South to southwest winds blowing south of the front may lead to isolated/scattered corn earworm moth flights through the period, with the best chance for more widespread flights tied to the cold front passage this weekend. Low migration risks are predicted tonight into tomorrow morning from Kansas and Missouri north into South Dakota, Minnesota, far southwest Wisconsin, and east into northwest Illinois. Low risks continue tomorrow night into Friday morning mainly west of I-35 and south of US 12. Moderate risks then enter the forecast Friday night into Saturday morning as the cold front begins to move southeast. The Moderate risk area is located across far eastern Nebraska, Iowa, southwest Wisconsin, and northern Illinois. Low risks then extend east into the southern Great Lakes region and eastern corn-growing region by Saturday night into Sunday. Growers are encouraged to monitor traps and scout fields especially where crops are at a susceptible stage of damage.