In what has become an unusual & memorable #PolarVortex season, zonal-mean zonal winds at 10 hPa & 60N are currently date-record easterly!
— Dr Simon Lee (@SimonLeeWx) May 3, 2019
Part of the reason: an axisymmetric anticyclone over the pole with remnant vortex nearby producing zonal easterlies (thermal wind balance). pic.twitter.com/uJO0mvfd2R