Gliding hat on
There is a common misconception that mountain wave cloud always classic lenticular.. Not always so. In my own gliding experience (my greatest height 27,000 feet+) the strongest and highest wave is above what looks like stratocu at around 3 – 5,000 feet (as today). I did much but not all my wave flying from Aboyne in the Dee Valley.
Current Aboyne webcams. The bottom image is the most useful - faces west up the valley.
http://www.deesideglidingclub.co.uk/webcam.html
When they get out of bed, you might be able to follow the gliders here:
http://live.glidernet.org/#c=56.78335,-2.37791&z=8&p=3&u=i
Jack
When gliding from Aboyne in a westerly or south westerly, the “hot spot” for contacting wave is as illustrated. Now the line of “lift” is usually over that road or at least, following the alignment of that road. But in stronger winds (or different vertical temperature profile), the actual line might be displaced downwind (paler blue dots).
Pilots can be caught in the wrong place because they haven’t appreciated that the wave has shifted either downwind or upwind of the usual spot. So it is only partially true to say that:
“All orographic induced waves are standing waves.” The wind and temperature profiles don’t usually change abruptly but that can happen. So it is occasionally possible to get moving (jumping) rather than standing orographic wave.
Jack
Pilots can be caught in the wrong place because they haven’t appreciated that the wave has shifted either downwind or upwind of the usual spot. So it is only partially true to say that:“All orographic induced waves are standing waves.” The wind and temperature profiles don’t usually change abruptly but that can happen. So it is occasionally possible to get moving (jumping) rather than standing orographic wave.