Overview
- Polar air is moving into Germany around the New Year, with forecasts indicating snow across much of the country in the coming days.
- Meteorologists warn the pattern can produce winter thunderstorms featuring brief heavy snow, lightning and strong gusts.
- Temperatures are forecast to plunge sharply, with some outlooks citing highs near −10°C, nights around −15°C and locally close to −20°C near the Alpine fringe.
- Ensemble models diverge on persistence, as several ECMWF runs allow a multi‑week cold regime while other guidance points to a shorter cold spell with a milder phase by mid‑January.
- Authorities highlight risks from ice and poor visibility, and the ADAC advises postponing trips when black ice or freezing rain is warned.