Northwest flow is expected to dominate the weather across much of the corn-growing region through much of the rest of the month of July. However, there will still likely be brief periods of southerly flow immediately to the east of low pressure systems that move through usually faster northwest flow. One such system is expected later this week, and a Low risk of corn earworm migration is predicted generally along and east of I-55 in Illinois, including central/eastern Illinois, Indiana, Ohio, northern Kentucky, portions of southern lower Michigan, and far southwest Ontario, Canada Thursday night into Friday morning. This may be a rather potent yet somewhat compact system, so only Low risks are predicted at this time due to the expected short duration of southerly flow. No other risks are in the forecast at this time, but growers are encouraged to monitor traps and scout fields especially if crops are at a susceptible stage to damage given the possibility for recent flights to have occurred.