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Story summary
- Winter 2025/2026 in Europe may experience extreme weather contrasts due to La Niña and the North Atlantic Oscillation (NAO).
- December will likely be stormy and wet, followed by severe cold in February from a weakened polar vortex.
- The NAO is expected to shift from positive in December to negative in January and February, raising Arctic outbreak chances.
- A potential Sudden Stratospheric Warming event in January could trigger significant cold spells.
- Oceanic patterns will add to seasonal volatility, affecting infrastructure and agriculture across Europe.
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