CLARION, Iowa - The farms of Iowa are the nation's number one supplier of the nation's corn.But this week, it's exporting oppressive humidity in large quantities.A phenomenon known as "corn sweat" is combining with a summertime heatwave in the Upper Midwest to make for some unbelievably humid conditions.Clarion, Iowa, reported a dew point of 90 degrees Wednesday afternoon at 2:15 p.m.
Central time. The air temperature at that time was also 90 degrees, resulting in 100% relative humidity and a heat index of 132 degrees.Some 130 miles west of Clarion in Maurice, Iowa, an even higher dew point of 91 degrees was recorded Tuesday evening between 5-7 p.m.