A map of the Midwest United States focusing on Iowa, Illinois, and Indiana. Storm reports from the <a href="https://en.wikipedia.org/wiki/August_2020_Midwest_derecho" class="extiw" title="w:August 2020 Midwest derecho">w:August 2020 Midwest derecho</a> are layered over the <a href="https://en.wikipedia.org/wiki/USDA" class="extiw" title="w:USDA">w:USDA</a> analysis of corn production areas.
United States Department of Agriculture, National Oceanic and Atmospheric Administration, National Weather Service
<p>USDA Weekly Weather and Crop Bulletin - Vol. 107 No. 33 - August 18, 2020 - <a rel="nofollow" class="external free" href="https://downloads.usda.library.cornell.edu/usda-esmis/files/cj82k728n/3t946c39r/w6634s119/wwcb3320.pdf">https://downloads.usda.library.cornell.edu/usda-esmis/files/cj82k728n/3t946c39r/w6634s119/wwcb3320.pdf</a>
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National Weather Service (Des Moines Office) - <a rel="nofollow" class="external free" href="https://www.weather.gov/dmx/2020derecho">https://www.weather.gov/dmx/2020derecho</a>