If you are able to get very close to the approach end of a runway
serving heavy jets (727 and up) you can usually see the downwash effect
on the smoke trail as the airplanes "cross the fence". AMAF if you can
get very close to the centerline of the runway you can usually feel the
downwash. On a humid day you can usually see the condensate streamers
graphically outlining the downwash. 27 at Stapleton was a wizard place
to observe this effect but alas it is now lost and gone forever.
Walt BJ
