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Abstract Storm Ciarán affected northern France, the Channel Islands and the United Kingdom as an intense North Atlantic depression on 1/2 November 2023, bringing damaging winds, large waves, heavy rain and an intense convective development spawning a tornado on Jersey. Amidst an extended period of stormy weather across Northwest Europe, Storm Ciarán was probably the most significant windstorm to affect the Channel Islands and northern France since the Great Storm of 1987 or Storm Lothar in 1999. Here we explore the storm’s evolution, forecasting strategies and challenges and climatological context from the perspective of Met Office operational meteorologists.
Keates et al. (Mon,) studied this question.