In Hamburg and Schleswig-Holstein, ice and fog are expected in places during the night from Friday to Saturday. According to forecasts by the German Weather Service (DWD), there will be maximum values of between two and four degrees on Friday during the day. At night, high fog and fog spread with the risk of ice due to freezing moisture. Down to minus four degrees are expected in places, up to minus two degrees on the coasts. According to the German Weather Service, it should only remain frost-free at one degree on Heligoland.