Low key day but fun to once again meet up with Anthony Cornelius and Michael Bath and friends arrived soon thereafter. Played around with a few multicells though left the south side cells and aimed for the northern one.
Then of course we went to Devil's Tower. Our aim was to get sunset here and perhaps mammatus. But we went a few more miles for a little lightning as we waited. I took interest in a developing base. We investigated this and found the base produced nice consolidation and organisation along strong convergence of sorts! The cell exploded literally above us. (Later on radar we found this to be a split). It showed impressive rotation which was filmed! It shrunk upwards soon after!
Started out in Rapid City area and after visiting Mt Rushmore, we rushed back to be ready for storm development! The storm quickly organised and drifted southeast, It had amazing structure for several hours. We then decided to leave it and head east and south of the developing complex. Very nice mammatus greeted us there! We ended up in Nebraska at a bed and breakfast after having fun with guys in the local pub.