Hello, I'm flying this Sunday and although it seems the weather is gonna be better than it has been the last week in western and central Europe I'd be interested to understand the Atlantic map :what's the big arrow? Im flying from Athens to Berlin.
The big green arrow is a jet stream, the cause of about 50-90% of all turbulence. Basically a fast moving river of air. Usually it's associated with some occasional light bumps, sometimes it can cause a LOT of bumps