... Then again as I was told many moons ago as a sprog if you don't know where the wind is coming from and how hard - all the time - you shouldn't be in the drivers seat. There are a plethora of cues/clues available.
'Winchman' by Colin Murray QGM, pbk, page167.
"... Some pilots can read the mountains like a book. They know exactly where the wind is coming from and they are on top of it all the time. I remember on one occasion, Tim Noble, the deputy chief pilot in Stonoway, turned to Captain John Bentley ... and said, 'John, I believe you're in league with the devil.'
What he meant was that John Bentley was really good at reading every puff of wind, the direction and strength, and knew exactly where every demarcation point was going to be. ..."