Some changes are in store to the extended portion of the corn earworm migration risk forecast as a rather potent low pressure system moving through the southern portion of the corn-growing region looks rather likely this weekend. As a result, corn earworm migration risks have been increased and extended further east into the Ohio River valley and eastern corn-growing region especially as we head into the 4th of July holiday. No risk continues in the forecast tonight into tomorrow morning, but as the low develops in the far western Plains states, Low risks are found across Kansas, Nebraska, western Iowa, far southern South Dakota, and far western Missouri by tomorrow night into Saturday morning. As a warm front sharpens to the east of the low by late Saturday into Sunday, south to southwest winds south of the front increase and so does the precipitation near the front. A Low migration risk is predicted by that time mainly from US 34 south (extreme southern Nebraska, southern Iowa, into central Illinois) and from Kansas east into Indiana and Kentucky. By Sunday night into Monday, south to southwest winds south of the front are likely to increase further, resulting in a Moderate migration risk into southeast Missouri, southern Illinois, southwest Indiana, and western Kentucky. Low risks extend as far north as I-80 and east into Ohio and Kentucky. With an increasing percentage of field corn acres now silking especially in Kansas, Missouri, and far western Illinois, growers should be on the alert for new flights over the holiday weekend. Fresh-market and vegetable growers south of I-80 should especially be watching for potential new flights, as well.