Saw Mt Rushmore, Devil's Tower and then went onto chase mode.
We watched the last demise of the first supercell SE of Billings given we were progressing west at a rapid rate (after site seeing). Another cell developed to it's south though it was dominated by another developing cell slightly to it's east. This was interesting given that even as a larger cumulus with substantial base, I could note rotation. Got some excellent timelapse of this cell and then got in front as it became HP. Filmed beautiful struture but missed some impressive pulsing bolts. We saw David Gold and crew in this area but raced further north onto the interstate then east and then south. But it had weakened at this point as I had anticipated based on the environment it was moving into. We also saw a very nice LP that developed prior to dusk south of Miles City. This was ahead of the other couple of cells that despite dropping some crazy bolts weakened as well.
It was a little tricky given the radar hole that existed. We ate our evening meal Chinese resturant with small candle lights - the power lights kept flickering due to the storm.
We also decided to stay the night in Miles City at Motel 6. It was a tiring day and many miles travelled once again.
Regards,
Jimmy Deguara