The German Weather Service reported on Thursday evening that a low pressure system was moving from the west over the northern center starting in the afternoon. Heavy, partly also extreme thunderstorms with massive effects are expected. Heavy rain with 40 liters per square meter in one hour is possible. Hailstones could be around 5 centimeters in size. Severe gale-force winds or hurricane-force gusts are expected.

In parts, extremely heavy rain with around 60 liters in a few hours is also likely. "Individual tornadoes are not excluded," the German Weather Service announced. There is a risk of small-scale flooding, branches and trees could break. The weather is expected to calm down Saturday night, according to the forecast.