How strong is the jet stream over the North Atlantic? Well, air traffic data can tell us. Filter by ground speed (640 knots). Subtract the typical cruise speed (470 knots). This gives a wind speed of about 170 knots (315 km/h) at cruising altitude. Map: @flightradar24 pic.twitter.com/OVkddV5pMH

— Matthias Sänger (@myweather_ch) October 31, 2023