An impressive tropospheric ridge is forecast to over take the North Pole during mid-December. This will shove a lobe of the Polar Vortex o/ E. Asia and the eastern U.S.. Expecting a high wavenumber pattern to emerge around the N. Hemisphere. Encourages extreme weather worldwide. pic.twitter.com/bYj9YCiEZg

— Mike Ventrice (@MJVentrice) November 29, 2017