A low pressure system is predicted to develop across the central Plains in the next 24 hours and then move east through the heart of the corn-growing region late this week and into next weekend. Southerly winds will be present to the east of this feature along with at least scattered precipitation, so some threat for corn earworm migration will exist. The overall weather pattern is not predicted to be optimal for larger scale flights so isolated, or Low risks, are in place starting tomorrow night and continuing into the weekend. Low risks are initially found mainly west of a Columbia, Missouri to La Crosse, Wisconsin line and to the south of I-90 in southern Minnesota tomorrow night into Friday morning as the low continues to develop in the Plains. As the low pressure system and attendant cold front push to the east, Low risks also shift east and are found mainly between I-35 and I-75, or from western Missouri and central Iowa east into western Ohio and southeast lower Michigan. Low risks continue Saturday night into Sunday morning mainly east of I-57 in eastern Illinois. Growers with crops at susceptible stages should continue to monitor traps and scout fields especially in the upper Midwest as some moth flights may have occurred in the past week or so.