Originally Posted by
blind pew
Thermals can do that as do inversions but as you’ve mentioned early morning thermals the inversion is likely to be much higher. Did a go around followed by further wake turbulence on second approach at LHR after sea breeze front had changed runways on to easterlies whilst we had a tail wind on approach.
Seen wind switch 180 degrees with an overall strength change of more than 10 knots through thermal release.
Thanks, the winds were varying at short final (100-50ft RA) but not to the extent of becoming tailwinds. The runway orientation was 27, and from 1000ft AGL till 400ft RA the W/V were 200-230degrees/7-8 knots, and by 100ft -50ft RA- 176-200- 7-8knot. Although I agree that thermals and inversion could be responsible, I was wondering if the vortices from the heavy aircraft could linger within the touchdown zone and add an additional ground effect.??