As i've been tweeting for while the #SPV stratospheric polar vortex is about to weaken. Not as significant as some model output suggested weeks ago but still extreme..below 10th percentile of model climate If 10hpa 60N #wind falls to 10m/s only happened 5 times in Oct since 1979 https://twitter.com/Petagna/status/1449405692595560452?ref_src=twsrc%5Etfw%7Ctwcamp%5Etweetembed%7Ctwterm%5E1449405692595560452%7Ctwgr%5E%7Ctwcon%5Es1_&ref_url=https%3A%2F%2Fwww.netweather.tv%2Fforum%2Findex.php%3Fapp%3Dcoremodule%3Dsystemcontroller%3Dembedurl%3Dhttps%3A%2F%2Ftwitter.com%2FPetagna%2Fstatus%2F1449405692595560452%3Ft%3DJEotkWltn0owYNzsIm0m5A26s%3D19