This Thursday, the eastern coast of Corsica prepares to face precipitation that will intensify from the evening, pushing the alert to orange vigilance for rain‑flood risk. According to Météo‑France, the phenomenon fits within a context of high atmospheric humidity and a moist air jet from the Mediterranean basin, a mixture that fuels local convection systems. Predictive models, including the GraphCast neural network and the Pangu‑Weather machine learning system, indicate persistence of rains until Thursday night, with forecast uncertainty remaining high due to the complexity of the island terrain.
What's happening: enhanced precipitation on the eastern coast of Corsica
Copernicus satellite data show an exceptional moisture supply above the Corsican terrain, with low clouds condensing rapidly from late afternoon. Météo‑France specifies that precipitation should intensify in the evening and continue Thursday, particularly on the eastern face of the island, where ravines and watersheds are most exposed. ECMWF models, combined with high‑resolution simulations, show rainfall amounts above seasonal averages, even though no exact figure is communicated in the brief.
This configuration is reinforced by a local convergence phenomenon: warm, moist air from the southeast meets a cooler air flow from the west, creating an uplift zone that favors the formation of heavy showers. Corsica's rugged terrain acts as a catalyst, forcing air to rise rapidly along slopes, which accentuates condensation and droplet fall. The result is a continuous rain band that, according to models, will persist until late Thursday night, increasing flood risk in urban and rural areas.