The ECMWF hires is blowing up heights over the North Pole into Alaska. This is the first step towards the highly touted pattern change in January. Note the wavenumber 5/6 pattern around the Hemisphere now, composed of 5 (arguable there are 6) anomalous troughs. pic.twitter.com/c8vM2H8fB9

— Mike Ventrice (@MJVentrice) January 8, 2019