Edit: Ack, a DD! Thank you very much, foreverQ and Anoya! This was taken on June 20, 2006, north of Ogallala, NE. Here is a full chase summary: [link]
and some more photos from this day: [link]
If you liked this photo, you may also enjoy my other DD: [link]
and more storm photos: [link]
Luck, patience, and more luck: what's what it took to get this shot. The lighting underneath this dying supercell was absolutely spectacular, which only helped the situation. This was the last shot I was going to take before packing up, because it was beginning to rain harder. That was the luck part. The patience part was taking many dozen photos before this, hoping to get a lightning bolt.
Colors were NOT altered in this photo; only curves was used. I tried to do Auto Saturation Enhancement, but the image is so colorful it actually DEsaturated the image!
Image adjusted in Paint Shop Pro 8.