A rather stagnant weather pattern is expected for much of the week as a cold front slowly sags south into the corn-growing region and high pressure stretches from the Tennessee River Valley northeast into the northern Great Lakes region and northeast United States. Southerly winds are expected to be a persistent feature especially from northern Texas into Oklahoma northward into the Plains states and western corn-growing region. Shower and thunderstorm clusters are expected to persist off-and-on through the period and could serve as insect drop zone regions in this area. Low risks are in place through Wednesday morning mainly in the Plains states but also into Minnesota, Iowa, and western Missouri Tuesday night into Wednesday morning.
In the extended period, the risk area remains largely across the western corn-growing region as high pressure remains in place in the eastern United States. Moderate risks are in place for both Wednesday and Thursday nights as more focused and slightly stronger southerly winds are expected in Nebraska, southwest Iowa, and into Kansas and northwest Missouri. Low risks are in place as far north as South Dakota, Minnesota, and southwest Wisconsin but only east to the Iowa/Illinois border southward into Missouri as south winds this far east are not expected to be particularly strong, if at all, especially further east into the eastern corn-growing region.