Melting snow and rain lead to an overflow in a river in Germany.. What happened?

Continuing heavy rains and melting snow due to improving temperatures caused an overflow in some locations of the Moselle River in Germany on Monday.
The Flood Prediction Center in the state of Rhineland-Palatinate, western Germany, said that the river’s water level is expected to reach its peak on Monday/Tuesday night.
According to the data, the maximum level of the river in the German city of Trier, near the border with Luxembourg, is expected to reach between 6.7 and 7.2 meters during the day.

Rain and snow

Rain and snow are also expected to continue in the coming days, with water levels on the Moselle River likely to rise by mid-week.
This is in addition to expectations that water levels will rise significantly in the smaller tributaries of the Moselle River, such as the Rover, Kiel, Zalem, Drun and Laser.
On the other hand, the center indicated that expectations of floods are currently uncertain due to the combination of snow, rain, and melting ice.