Most amazing St Elmo's fire I ever saw was on Concorde in late 1991; We were subsonic over Saudi (returning from BKK/BAH), and caught in an electrical storm. The visor glazing was covered with this crazy bubbling electrical discharge, and the nose pitot had a blue glow around it, extending forward from the aircraft. Unfortunately none of us had a camera with us on the F/D. It would have been an amazing picture, it was like Star Wars up there!!

.