Anomalous jet-stream is not linked only with abnormal coldwaves across Northern Hemisphere, but in some regions, a meander of Rossby wave is turned to very northern latitudes. It has become last week (mainly weekend) in Italy, Tunisia, Libya, Malta, Greece and Bulgaria /https://mkweather.com/2021/01/11/weather-in-europe-has-crashed-tropical-day-in-italy-302c-the-hottest-january-day-ever//. Only subsequent night (Monday, 11. January), after ...