On Friday, August 25, 2017 at 9:18:40 AM UTC-4, Tim Taylor wrote:
We tend to get both traditional wave and hydraulic jumps in northern Utah.. We also get compression wave in areas where two ranges are close enough to cause interference. I would love to see models that predict some of the dynamic flying we see in the fall through spring. I have had 10 knots straight off a ridgeline to 18,000 feet and other unexpected lift areas.

Compression wave? We have had real wave and low lying rotor here in Michigan which is flat as a pancake. Could this be a compression wave phenomenon? Would love to have some literature reference to read about this! Any references?

Thanks!