Maybe this helps:
St Helena: a meteorological viewpoint: Claire Bartholomew, applied scientist at the met office, explains how meteorological observation requirements were assessed for the soon-to-open St Helena Airport. - Free Online Library
and
http://www.metoffice.gov.uk/media/pd...Helena_RGB.pdf
Note: The text has been edited and changed the last few days (or hours) !
The original statement was:
Benefits
Assessment of the wind shear risk was found to be relatively low. However we were able incorporate other findings arising from our analysis to highlight other risks that were not previously anticipated. (Screenshots are available).
This is a clear indication that something is terribly wrong. SAMS / The Sentinel reported that some wind measuring instruments were moved and installed at wrong locations, not by the runway but 3 km away. The installation and maintenance reportedly also have been sloppy. The Met Office - at least for some time - was fed with useless data from a wrong location.
I am not a metereologist, but I can imagine measuring wind conditions in the approach to runway 20 with balloons from boats could not have cost a fortune.