According to the person that the , Jason Asselin, the strange orange clouds that formed over the U.S. Midwest on, July 23, looked like "Bubble Cups," but in meteorology terms are called Mammatus clouds and are very rare in the Midwest.
Asselin is quoted as saying "All of a sudden it got very yellow outside, it felt strange and mysterious. Then it slowly looked very orange, it was the craziest thing I have ever witnessed over my head. I almost expected to see a tornado or something!
Jeff Last is a National Weather Service Coordination meteorologist and he posted some photos on Twitter, of these strange orange Mammatus, or mammatocumulus, clouds, stating they were "a rare phenomenon."