An active weather weekend is predicted across at least the western and southwestern portion of the corn-growing region. A low pressure system will continue to develop across the Plains with a warm front lifting north and eventually stretching from west to east, or slightly northwest to southeast, from the central Plains into the Mississippi River valley. Southerly winds and increasingly warm to hot temperatures south of the boundary will allow mainly isolated corn earworm flights initially into Kansas, Nebraska, southern South Dakota, Iowa, and Missouri tonight into tomorrow morning. As the low pressure continues to develop and a cold front begins to push southeast into the Plains and eventually Midwest, an isolated corn earworm flight risk shifts east into the Mississippi River valley tomorrow night into tomorrow morning, or from Kansas and Missouri northeast into Iowa, Illinois, southern Minnesota, and southern Wisconsin. The cold front is predicted to settle south late in the weekend and early next week, so the primary migration risk settles into Kansas, Missouri, and southwest Illinois. No additional risk is in the forecast early next week as predominantly northwest flow is predicted to return to much of the corn-growing region at least through Tuesday of next week.