Just before xmas, I discussed the formation of the NE Atlantic/UK Ridge at the end of the month. It plays an important role in the polar vortex split. This week, through non-linear dynamics, we will see this feature intensify. GFS jet/irro courtesy of @AliciaMBentley pic.twitter.com/KZgcFJnuIy

— Anthony Masiello (@antmasiello) December 31, 2018