A series of low pressure systems will be moving through the corn-growing region between now and this weekend. The first low should pass well to the north into Canada, but a cold front will push southeast and provide a corridor for a second low pressure to pass from the southern Midwest northeast into the Great Lakes region Friday into Saturday. Low corn earworm migration risks are focused to the east of the first low from the Plains states as far east as lower Michigan and far northwest and western Ohio tonight into tomorrow morning. As southerly winds continue to expand to the east, Low risks follow suit and are found into southwest Ontario, Canada and further east into Ohio by tomorrow night into Friday morning. As the second wave of low pressure moves northeast along the cold front, risks will remain focused mainly to the east of a Kirksville, Missouri to south of Green Bay, Wisconsin line Friday night into Saturday morning. Widespread rains may limit the overall migration threat, but decent south to southwest winds may still result in isolated flights especially into the Great Lakes region. The front will move east and end the migration threat at least into early next week. Growers all across the upper Midwest and Great Lakes regions should continue to monitor traps and scout fields where the crop is still at a susceptible stage to damage as flights may have or are currently occurring.