Back in August 2010, I did a last minute road trip to check off state #49 from my list--New Mexico (the only one left for me is Hawaii). On my way back, I saw conditions setting up for a possible tornado in eastern Colorado, and started blasting north from New Mexico. I missed a tornado in Brush, Colorado by about an hour, but I did shoot this photo along the way, and got pictures of a cool shelf cloud. More photos and a map here.
Note: This is the next in a series I'm doing on my photos with a crowdsourced ranking. You can see all 20 of the photos here.