I did not know what was happening in this photo until later someone told me that it was a low pressure system moving in.
A low pressure system and a high pressure system collided in front of me. I have never seen this phenomenon before. The sky was changing so rapidly that I was barely able to get a few frames before the darkness took over the whole sky. I seemed as if the sun rays were battling off the darkness and held out as long as it could. At the left of the image the clouds are to the ground and were pushing to the right.