Overview

• Germany’s weather service places Ex‑Erin between Iceland and the British Isles, where it is redirecting subtropical air and initiating a rapid shift in conditions.
• After peaks near 30–32 °C in western and southern areas, thunderstorms spread from the southwest on Wednesday with heavy showers, hail and strong gusts.
• Forecasters flag the southwest and Alpine fringes for the highest rain risk, with 15–25 l/m² in short periods and local pockets up to 30–40 l/m²; model guidance over the southern Alps/Ticino shows 100–300 l/m² with flood and landslide danger.
• A cooler, more unsettled pattern follows late week, with daytime highs broadly around 18–25 °C and frequent showers.
• Winds strengthen into the weekend, with a gusty to locally stormy regime and coastal peaks near 70–80 km/h.