[Gromholt]

I would like to know how the jetstream affects the creation of high pressures and low pressures. Or the other way around: How the high pressures and low pressures affect the jet stream.:-)

[Uskys]

A warm welcome to UKww Arvid :) .
The Jet stream does affect the pressure flow, though this is a very complex process as its not only the pressure but the heat generated ( and other factors ).
As a basic understanding, the jet stream 'encourages' higher pressure on its southern flank and thus lower pressure flowing off North.
However, i hope somebody more educated than me can answer better !!....Good Interesting Question [y]

[Howard Kirby]

The "left exit region" is where lows tend to deepen or favour. The jet stream tends to run along (in our latitudes) the Polar front. The jet stream can meander or run straight. Meandering is called a Meriodonal flow whereas straight is called zonal flow. In a meriodonal flow you can get blocking or "omega" patterns where an High pressure area can sit for ages and divert the jet around it. A zonal flow tends to bring wet and windy weather across the Atlantic to the UK in the winter esecially.

[Brian S]

Welcome to UKww - [y]

A difficult one to answer, in fact a quick search bought this lot up and raised more questions than answers but would make a good night's reading  :)