A rather persistent weather pattern is expected across much of the corn-growing region this week, as high pressure remains over the southeast United States and low pressure meanders across southern Canada and eventually east of the Rocky Mountains. In between these two pressure centers, southerly winds are likely and there may be some isolated black cutworm moth flights in this corridor, as well. Low migration risks are predicted tonight into tomorrow mainly west of Lake Michigan and the I-55 corridor in Illinois and eastern Missouri. Low risks eventually spread east into the southern Great Lakes and even into the eastern corn-growing region by the weekend, and a risk upgrade may eventually be needed by that time as low pressure deepens and sends a cold front east across the corn-growing region this weekend. Some uncertainties with a low pressure system developing in the Gulf of Mexico and strength of the corn-growing region low, however, preclude the risk upgrade at the present time.