Mountain wave - but look at the wind !

[jack.h...@gmail.com]

Received wisdom has it that the wind should be close to right angles to the mountains that might kick off the wave.  But recent gliding observations have shown that the wind can be many degrees 'off' the perpendicular.

Glider pilots on Tuesday reached more than 20,000 feet in the lee of the Cairngorms.

My time-lapse (not in prime 'wave country') illustrates how far off the perpendicular the wind can be.

https://www.youtube.com/watch?v=eg1ngXZy6P4

Static photo late afternoon.  Wind right to left.

Jack

[jack.h...@gmail.com]

Alastair Mutch's in flight photos can be seen here

https://bgaladder.net/DailyScores

Jack