I am not a pilot, and if this thread is in the wrong place I apologise.
The Daily Mail carried a very melodramatic report to the effect that "hundreds of millions of taxpayers money has been wasted building an airport on St Helena which is unusable because of a wind shear issue that should have been foreseen". Reading it, I thought I detected some journalistic licence. :
St Helena island's £250m airport where jets can't land because it is too windy | Daily Mail Online
https://en.wikipedia.org/wiki/Saint_Helena_Airport
It would be nice to hear from professionals on this.
(thanks Moderators for moving this from "Rumours..." I did try to search the forum but failed to find this most enlightening thread - thanks everyone!