Yes, these are the hills generating the rotors. And please, do not think that I am denying that rotor streaming is real, and that it is hazardous.
AA,
Sorry, bad wording on my part. I didn't mean to imply any denial on your part. I should have written "rotor streaming" as it is a term I have never seen before. Does it mean something different from the rotors associated with lee wave activity?
I have a lot of experience with flying gliders and tow planes in rotors and have a great deal of respect for them. A very experienced tow pilot friend of mine used to say "The rotor is not rough unless you get rolled inverted!"
PS I’ve answered my own question:
https://ams.confex.com/ams/10Mountai...aper_40697.htm