A tornado swept over the North Rhine-Westphalian town of Gronau on Thursday. The tornado, classified as IF1, produced wind speeds of up to 150 kilometres per hour. ADVERTISEMENT ADVERTISEMENT Heading into the weekend, Germany’s national weather service (DWD) is warning of isolated thunderstorms and several hours of rain. For Friday, forecasters predict a mix of sunshine, cloud and scattered showers. Thunderstorms, heavy rain and small hail are expected, particularly in the north, accompanied by