Low corn earworm migration risks return to the forecast tomorrow night into Friday as a newly-developing weather system in the northern Rocky Mountain states and southern Canada spreads southerly winds across the Plains and western corn-growing region. Low risks are predicted mainly west of I-35 during this time. By Friday night into Saturday, the Low risk spreads east to Lake Michigan and the I-57 corridor in Illinois as a cold front begins to push into the eastern Plains and Minnesota. Low risks continue mainly across the southern Great Lakes and eastern corn-growing region Saturday night into Sunday as the cold front continues its march southeast. Given the quick movement of this system, elevated risks are not in the forecast at this time but we will continue to monitor. Growers are encouraged to continue to monitor traps and scout fields, especially if at a vulnerable stage to corn earworm damage, as some moth flights likely occurred this past weekend.