An extended period of hot and humid weather is fast approaching. A hugh ridge of high pressure in the upper atmosphere will intensify over the middle of the nation beginning late this week and weekend and extending into the early part of next week or longer.
High temperatures will reach the 90-95 degree range in the eastern cornbelt with heat index values to over 100 degrees over the weekend. In the western cornbelt 90-95 degree temperatures will be common with the potential for 100 degree heat particularly in the southern and western sections.
Rainfall will be spotty and light the next week to 10 days with potentially better rainfall amounts and coverage beyond this period. Subsoil moisture is fine across the midwest, but topsoils are drier over parts of eastern Iowa, northern Illinois, Indiana and Ohio.
Elsewhere rainfall has been significantly above normal from Eastern Nebraska, western and southern Iowa, northern Missouri, west central and the southern one-half of Illinois as well as Indiana and southwestern Ohio.
Most of the corn crop will be pollinating in the next few weeks across the Corn Belt states. The corn crop could be stressed during the reproductive stage with high temperatures in the 90s to near 100. The central question now is how long the heat will last into next week and beyond?