A short report from La Brévine, Switzerland and Austrian lower elevated valleys.
In La Brévine, the last 15 days, were persisting anomalously cold mornings.
Only in 12 from 15 days, minimum temperatures reached -15/-25°C, with an absolute minimum on 22. December 2021, -25,7°C.
On the same day, in Amburnex Combe, around 1200 MASL, only -33,3°C was measured /https://mkweather.com/amburnex-combe-switzerland-333c-the-strongest-frosts-of-winter-2021-2022-in-continental-europe-so-far//, which is the lowest temperature in continental Europe up to similar elevations in Winter 2021/2022.
Meanwhile, St. Michael im Lungau, Austria, 1094 MASL, reported on 23. December 2021 -19,6°C (previous day -19,5°C in Randstadt, 836 MASL and -19,2°C on Oberstdorf, Germany, 810 MASL: https://mkweather.com/ranstadt-austria-836-masl-195c-oberstdorf-germany-810-mals-192c/).
From the west, currently, a significant warm spell is coming above Europe, including the Alps, but around the New Year, the next extreme coldwave is still forecasted.
About severe frosts in Europe shortly before Christmas, we were informed in a series of the next articles /https://mkweather.com/poland-with-an-even-colder-record-orawa-region-with-214c-czechia-21-22c-slovakia-18-19c/; https://mkweather.com/karajukica-bunari-serbia-238c-balkan-eastern-europe-and-the-baltic-regions-with-15-20c-the-next-mornings-will-be-colder/; https://mkweather.com/braemar-the-uk-102c-elseborn-belgium-94c-and-arcen-eelde-the-netherlands-70c/; https://mkweather.com/ranstadt-austria-836-masl-195c-oberstdorf-germany-810-mals-192c/; https://mkweather.com/avignon-france-with-the-coldest-period-since-the-legendary-winter-2011-2012/; https://mkweather.com/moscow-222c-and-real-feel-31c/; https://mkweather.com/amburnex-combe-switzerland-333c-the-strongest-frosts-of-winter-2021-2022-in-continental-europe-so-far//.
While the first 2 decades of December 2021 were in European mid-latitudes relatively milder /https://mkweather.com/esrl-composites-for-europe-for-the-first-4-pentads-of-december-2021-early-winter//, already around Christmas and New Year 2021-2022 is 40% chance, that AO index will fall extremely low, into the interval -5/-7 /https://mkweather.com/12-30-runs-of-gefs-expect-an-extremely-low-ao-index-from-5-to-7-for-christmas-time-and-new-year//.
An Arctic Ice Sea Extent was in the last period the 2nd highest in the last 15 years /https://mkweather.com/arctic-sea-ice-extent-is-the-2nd-highest-in-15-years//, moreover, La Nina is ongoing and strong AO- and NAO- are expected, together with wet MJO above SE Asia and negative IOD (additional factors).