I also think some of the confusion is coming from the use of the term 'weakening'. It is true that the primary jetstream wind pattern is weakening relative to it's stabler state.
That weakening means the jetstream meanders more, with more latitudinal movement in its form.
The strength overall of the jetstream wind is weaker when it's meandering, but can also be much more intense in places.
This says nothing about humidity or energy or pressure, just windspeed and direction.
That weakening means the jetstream meanders more, with more latitudinal movement in its form.
The strength overall of the jetstream wind is weaker when it's meandering, but can also be much more intense in places.
This says nothing about humidity or energy or pressure, just windspeed and direction.