Overview
- Western regions are affected first before the plume spreads toward the north, northeast and then eastern France by Friday, with skies taking on ochre hues.
- Particle levels are expected to be moderate and surface deposits are unlikely without rain, though possible Friday showers in the north could leave a light film.
- La Chaîne Météo warns that fine dust can aggravate symptoms for people with asthma or cardio‑respiratory conditions.
- In mountain areas, grains can tint the snow and lower its reflectivity, which may hasten melting even without local precipitation.
- Meteorologists highlight early, uncertain signals of a second, stronger episode early next week, with some models indicating much higher concentrations.