Judah Cohen on Twitter: "For those interested at an early look, the blog, is now available for a fee. I've been conflicted about the evolution of the pattern across the N Hemisphere
![Negative Arctic oscillation conditions are associated with higher than... | Download Scientific Diagram Negative Arctic oscillation conditions are associated with higher than... | Download Scientific Diagram](https://www.researchgate.net/publication/235329809/figure/fig1/AS:655160351129609@1533213808197/Negative-Arctic-oscillation-conditions-are-associated-with-higher-than-usual-atmospheric.png)
Negative Arctic oscillation conditions are associated with higher than... | Download Scientific Diagram
![Stratospheric Polar Vortex returns for Winter 2021/2022, together with a strong easterly wind anomaly high above the Equator, impacting the Winter season Stratospheric Polar Vortex returns for Winter 2021/2022, together with a strong easterly wind anomaly high above the Equator, impacting the Winter season](https://www.severe-weather.eu/wp-content/gallery/world-weather/polar-vortex-winter-2021-2022-upper-stratosphere-wind-forecast.png)
Stratospheric Polar Vortex returns for Winter 2021/2022, together with a strong easterly wind anomaly high above the Equator, impacting the Winter season
![Polar Vortex now starts to slow down, affecting the weather patterns in the coming weeks, as we head deeper into Spring Polar Vortex now starts to slow down, affecting the weather patterns in the coming weeks, as we head deeper into Spring](https://www.severe-weather.eu/wp-content/gallery/world-weather/weather-forecast-march-april-2021-united-states-europe-polar-vortex-warming.png)
Polar Vortex now starts to slow down, affecting the weather patterns in the coming weeks, as we head deeper into Spring
![A warming event begins for the Polar Vortex in the stratosphere, powered by the strong cross-polar ridging, as we head into the 2022 Spring season » Severe Weather Europe A warming event begins for the Polar Vortex in the stratosphere, powered by the strong cross-polar ridging, as we head into the 2022 Spring season » Severe Weather Europe](https://www.severe-weather.eu/wp-content/gallery/andrej-news/weather-forecast-north-hemisphere-what-is-strong-weak-polar-vortex-winter-pattern-update.png)
A warming event begins for the Polar Vortex in the stratosphere, powered by the strong cross-polar ridging, as we head into the 2022 Spring season » Severe Weather Europe
![The stratospheric polar vortex and sudden stratospheric warmings - Lee - 2021 - Weather - Wiley Online Library The stratospheric polar vortex and sudden stratospheric warmings - Lee - 2021 - Weather - Wiley Online Library](https://rmets.onlinelibrary.wiley.com/cms/asset/0aac016f-0dbc-463a-ab85-609d203f3768/wea3868-toc-0001-m.jpg)
The stratospheric polar vortex and sudden stratospheric warmings - Lee - 2021 - Weather - Wiley Online Library
Judah Cohen on Twitter: "Today's blog reads like a greatest hits album discussing sudden stratospheric warmings, stretched #polarvortex, Greenland & Alaskan blocking, negative AO & NAO #cold & #snow all in the
![Polar opposites team up to examine impact of Arctic disturbances on winter weather patterns - Woodwell Climate Polar opposites team up to examine impact of Arctic disturbances on winter weather patterns - Woodwell Climate](https://assets-woodwell.s3.us-east-2.amazonaws.com/wp-content/uploads/2020/11/23171259/tfcstDJF21_model_cropped.png)
Polar opposites team up to examine impact of Arctic disturbances on winter weather patterns - Woodwell Climate
![Frontiers | Analysis of the Positive Arctic Oscillation Index Event and Its Influence in the Winter and Spring of 2019/2020 Frontiers | Analysis of the Positive Arctic Oscillation Index Event and Its Influence in the Winter and Spring of 2019/2020](https://www.frontiersin.org/files/Articles/580601/feart-08-580601-HTML/image_m/feart-08-580601-g001.jpg)
Frontiers | Analysis of the Positive Arctic Oscillation Index Event and Its Influence in the Winter and Spring of 2019/2020
![Frontiers | The Effect of the Arctic Oscillation on the Predictability of Mid-High Latitude Circulation in December Frontiers | The Effect of the Arctic Oscillation on the Predictability of Mid-High Latitude Circulation in December](https://www.frontiersin.org/files/Articles/736085/fphy-09-736085-HTML/image_m/fphy-09-736085-g012.jpg)