“The jet stream causes all of our weather”

 The fast-moving bands of air that blow from west to east divide the cold air from the polar regions from the warmer air from the tropics, and typically occur in the mid-latitudes. However, the jet stream can develop deep waves, which push colder air southwards and warmer air northwards.

FT 9 January 2023

https://www.ft.com/content/81af6ef5-e241-4496-ac36-38d3fcfe0956

 The southern Pacific Ocean locked in its La Niña phase for three winters

 Its long duration is a problem. The large, persistent mass of cold air and high pressure influences wind patterns known as jet streams across the Pacific and the Indian Ocean. 

The Economist 18 November 2022

https://englundmacro.blogspot.com/2023/01/the-southern-pacific-ocean-locked-in.html

Europe’s String of Extreme Heat Waves Linked to Jet Stream

Bloomberg 5 July 2022

https://englundmacro.blogspot.com/2022/07/europes-string-of-extreme-heat-waves.html