Thunderstorms are weather phenomena characterized by the presence of thunder and lightning. They are caused by the rapid upward movement of warm, moist air, which cools and condenses to form cumulonimbus clouds. Within these clouds, strong updrafts and downdrafts create a dynamic and turbulent environment, leading to the development of thunderstorms.
Europe weather September 21–27, 2026: Seville nears 38°C, Paris warms to 30°C, the Baltics turn wet and windy, and Ukraine faces heavy rain, thunderstorms and strong gusts.
ESTOFEX has issued Level 2 for east-central and northeastern Germany into western Poland. Damaging wind gusts, heavy rain and an isolated tornado are possible on September.
Former Typhoon Krovanh is now a tropical depression, but its moisture is intensifying Japan’s autumn rain front. Linear rain bands have formed in Aichi and Gifu, with flooding, landslides and renewed heavy rain risk from Tokai to Kanto.
Japan Heavy Rain Forecast: Former Typhoon Krovanh Brings 250 mm Flood Risk Read Post »
September 2026 weather forecast for the USA and Canada using ECMWF EC46. See where extreme heat continues, where fall arrives first, and the wettest cities.
Severe weather alert Aug 26–Sep 1: Typhoon Saudel hits Okinawa, Phoenix nears 118°F, Europe storms intensify and India faces heavy monsoon rain.
