Northwest flow is expected to be the dominant weather driver across much of the corn-growing region for the next week. Periodic weather systems moving through the progressive flow, however, will bring brief opportunities for corn earworm migration on southerly winds prior to cold fronts. The first system is expected to impact portions of the area tonight into early Thursday, and Low migration risks are predicted generally across Kansas, southern Nebraska, southern Iowa, and into Missouri tonight into early tomorrow. Low risks then shift east with a cold front and are mainly focused from southeast Missouri and Illinois east into the southern Great Lakes and eastern/southeastern corn-growing region tomorrow night into Thursday. Low risks then return to areas mainly west of the Mississippi River by later Friday into the weekend, although details are a little sketchy at this point but the overall theme is overall weaker southerly winds and no larger scale migration events are expected at this time.