Has anyone noticed if or where on Jepp Charts or Aerad charts they have a decode of the windsock at the airport ?. .What I mean is, two entries above differ on the wind strength required to make a windsock fly stiff horizontally. One guy says 15 Kts, one says 25 kts. Has anyone seen it written anywhere that (say) Heathrow windsocks stand stiff and horizontal at 15 Kts, 25 Kts or something else ?
p.s. I know the Tower Controllers give us the wind velocity prior to Takeoff and Landing, but I make a point of looking at the windsock anyway.