December 30, 2020,
Europe, Great Britain
December 23-25, 2020
December 23, 09 UTC
Winter storm GRETA caused stormy and rainy weather in Europe and the British Isles over the Christmas holidays. The highest wind speeds with 141 km/h were
recorded at Cairngorn (UK) and Cap Bear (FR) on December 25. The massive warm front clouds of the Shapiro-Keyser cyclones also resulted in striking precipitation
amounts, as also on December 25 on Mount Pilatus in Switzerland with 62.9 mm. In addition, a pronounced mistral with wind speeds up to 148 km/h developed on the
same day in France.