A fairly potent weather system is predicted to move through the corn-growing region over the next several days. A cold front trailing south from an area of low pressure will be the dividing line between south to southwest winds to the east and west to northwest winds behind it, and the corridor of south to southwest winds may contain some migrating black cutworm moths. As a result, Low migration risks are predicted tonight into tomorrow generally west of Lake Michigan and the I-57 corridor in eastern Illinois. By Thursday night into Friday, the system gains some strength and Moderate migration risks are focused on the southwest Great Lakes and adjacent states to the south and west, including portions of Missouri, Iowa, Wisconsin, Illinois, Indiana, Ohio, and lower Michigan. Low risks extend as far east as southern Ontario, Canada and into Ohio and Kentucky. Low risks continue east with the cold front Friday night into Saturday, mainly for areas southeast of a line from near Springfield, Missouri to Chicago, Illinois. While there is no current threat to any crops, these migration events this time of year may lead to generations that develop in May when corn is emerging, so growers are encouraged to monitor traps to help determine possible emergence next month.