On Sunday, August 27, 2017 at 7:57:40 PM UTC+3, wrote:
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?

I've read somewhere that in the right conditions (profiles of stability and wind speed with altitude) cumulus cloud streets can trigger wave. Or convergences.