Signs are emerging that #PolarVortex,may endure another tropospheric attack(End Jan) with wave1/2 Heights/Temp, but this again, looks to be an idle one,up to 50hPa. Maybe Febr will bring the main dish, but chances are probably on the downslope!@SimonLeeWx @judah47 @MattHugo81 pic.twitter.com/NvuA6LWgAr

— Harry Spoelstra (@HarrySpoelstra) January 17, 2020