The worst windshear I have experienced was on approach to GQNN, a couple of years ago.
The First officer had made rather a mess of the first hand flown ILS approach, and was 'done in' so he said.
Lockheed to the rescue.
Couple it all up for an automatic approach/land and with calm wind reported at the surface, the FMS showed a crosswind of fifty knots at 400 agl.
Drift angle, 12 degrees.
The 'ole TriStar comes sliding down the glidepath at Ref+40, and at 5 feet radio height, the speed was right at Vref.
Thirty five year old technology at its best.
Ahhh, Lockheed!