Unveiling the Jet-Stream Pattern Behind Extreme Winter Weather

A new study has identified a jet-stream pattern known as a wave-4 that locks in extreme winter cold or wet conditions over North America and Europe for weeks at a time. These weather waves have doubled in frequency since the 1960s and have caused significant damage and loss of life. While winters are getting milder on average, the study highlights the increasing risk of extreme cold and wet events. The researchers suggest that the destabilization of the jet stream due to rapid warming in the Arctic may be contributing to the amplification of these weather patterns. Understanding the mechanisms behind these patterns could help improve predictions and mitigate the impacts of extreme weather events.