WeatherThe polar vortex can break much earlier than expected: what is it and how can it affect Catalonia?Xavi Segura02-11-2026
![Pre-alert for snowfall at very low altitudes](data:image/svg+xml,%3Csvg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 16 9"%3E%3C/svg%3E)