Tailwind
I've noticed a lot of questions about tailwind during landing and takeoff, but I was wondering about limits during the cruise.
The Jetstream has been very changeable over the last few days. I noticed that westbound tracks were going way way north a few days ago and east bounds were using the tailwind to their advantage. Some flights arriving at LHR 80 minutes early.
A colleague is returning from Miami on Wednesday / Thursday and the forecast shows tailwinds of 180-200 knots in places.
Would speeds of that kind be safe for a majority of transatlantic aircraft or would they keep the eastbound tracks away from the excessive winds?
L