We also chased the very impressive Bowdle, SD supercell. Storms initially fired northwest of Gettysburg, SD near highway 83 and we watched the storm slowly organize from southeast Lowry, SD. It passed to our north and we moved quickly to highway 47 and approached the storm from the south. We first noticed a cone tornado at 6:14pm CDT to the west of highway 47. The tornado crossed the road at about 6:19pm CDT.
We then tried to reach highway 12, but the road was blocked. Unfortunately, this prevented us from catching the tornado as it approached Bowdle and we could not get in front of it again. We followed the storm, from behind, as it paralleled highway 12 and observed incredible motion and very strong RFD winds. Overall, it was a good day despite missing some of the show further east. There are some awesome images in this thread! Congrats to all who saw storms on Saturday!
Tornado just west of highway 47. Picture taken at 6:17pm CDT and is looking north northwest.
http://i48.tinypic.com/otq1dg.jpg (Tornado east of highway 47. Picture taken at about 6:20pm CDT and is looking north northeast.)
http://i45.tinypic.com/2eq5s9d.jpg (Wall cloud observed from position behind the storm. Picture taken at 6:28pm CDT from 1.3 miles south of highway 12 and is looking northeast. This is close to the time when the Bowdle wedge was occurring. Incredible motion could be seen at this time in the wall cloud.)
http://i50.tinypic.com/r2731c.jpg (Another picture from behind the storm, taken at 6:27pm CDT and is looking northeast.)