![The polar vortex is going to make you put on a sweater. Be afraid. Be very afraid. | NOAA Climate.gov The polar vortex is going to make you put on a sweater. Be afraid. Be very afraid. | NOAA Climate.gov](https://www.climate.gov/sites/default/files/styles/full_width_620_original_image/public/ENSO-Blog_Jan-_22_2020Fig1_Polar-VortexMapLg.png?itok=O-ZvnzWa)
The polar vortex is going to make you put on a sweater. Be afraid. Be very afraid. | NOAA Climate.gov
![A strong Blocking system is forming over Greenland, changing the Weather patterns across Northern Hemisphere as we head into Spring » Severe Weather Europe A strong Blocking system is forming over Greenland, changing the Weather patterns across Northern Hemisphere as we head into Spring » Severe Weather Europe](https://www.severe-weather.eu/wp-content/gallery/andrej-news/polar-vortex-weather-forecast-north-hemisphere-what-is-polar-vortex-strong-weak-circulation-winter-pattern-jet-stream-anomaly-stratospheric-warming-process.png)
A strong Blocking system is forming over Greenland, changing the Weather patterns across Northern Hemisphere as we head into Spring » Severe Weather Europe
![Analysis: Polar Vortex collapse causes heavy winter for North America and the Nordics - Kjeller Vindteknikk Analysis: Polar Vortex collapse causes heavy winter for North America and the Nordics - Kjeller Vindteknikk](https://www.vindteknikk.com/wp-content/uploads/2021/02/polar_vortex_BI-1080x675.jpg)