Overview
- Overnight snow reached low elevations from the Rhône valley to Brittany, leaving light accumulations and prompting road salting and de‑icing operations.
- Paris recorded its first Christmas Day frost since 2010 at the Montsouris station, with national temperatures marking the coldest December 25 since that year.
- Prefectures activated the plan grand froid in about 15–20 departments, adding shelter capacity and extending outreach; the Nord reported 385 extra places and reinforced maraudes.
- Météo‑France placed Aude, Haute‑Corse and Pyrénées‑Orientales under orange vigilance for crues and pluie‑inondation from Thursday evening into Friday, with local totals up to 150–200 mm and heavy mountain snow.
- Forecasters flagged localized freezing‑rain risk in Tarn and Aveyron and cautioned that the Mediterranean episode would persist into the weekend before conditions gradually improve.