Corn earworm migration risks are in the forecast for the holiday weekend as low pressure continues to develop in the High Plains and southern Canada. A cold front is expected to move southeast through much of the corn-growing region by early next week before weakening. South to southwest winds will usher in very warm to hot temperatures and increasing humidity, and precipitation along or ahead of the front may serve as a favorable drop zone for migrating corn earworms. Low risks are predicted tonight into tomorrow from the Plains states, including as far north as North Dakota, east into portions of Wisconsin, far western Illinois, and Missouri. Moderate risks are in the forecast tomorrow night into Saturday across portions of Kansas, Nebraska, Missouri, Iowa, Minnesota, Wisconsin, and Illinois as a corridor of more favorable southerly winds, originating from source regions in Texas and also traveling over where moths have increased in numbers in the last few weeks. With a higher percentage of crops now in critical growth stages (either/both field corn and fresh market/produce), the elevated risk is warranted at this time. Low risks may extend as far east as the I-69 corridor in Michigan, Indiana, and Kentucky by Saturday morning. Low risks then focus east of I-35 by later Saturday into Sunday as the front begins to move southeast and also weaken. Growers are encouraged to monitor traps and scout fields, especially those fields that are susceptible to corn earworms at this time. Numerous isolated to scattered moth flights have been noted in the last week or so, and the possibility for additional moths arriving exists, as well.