After #ssw perfect chart for the downwelling from strato to tropo #PolarVortex @judah47 @mikarantane @wxcharts @SnowbieWx @HarrySpoelstra @WinterExpert @UK_WeatherNotes @HenkNiemeijer1 pic.twitter.com/SzNlmUj8w6

— PV-Forecast (@PvForecast) January 10, 2019