500mb mean geopotential loop from EPS forecast, courtesy of @weatherbell, shows the tropospheric polar vortex being shoved into Asia. The background flow reduces over NE PAC to N Atlantic sector (post jet extension), so new RWT activity produces anomalous meridional flow. pic.twitter.com/FVC5T22Mfm

— Anthony Masiello (@antmasiello) October 17, 2019