This week’s image was taken a few days ago as a trough moved east through the central United States.
This image shows an associated cold front and the clouds ahead of the frontal boundary as a trough moves through the Great Plains. Trough patterns like this often bring severe weather to the Great Plains in the spring, and sometimes in the fall However, this particular trough was docile, and on the large scale, it only lowered temperatures behind the cold front.
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College of DuPage – SATRAD