Great Lakes Water Levels
Despite their vastness and ageless beauty, we often forget that the Great Lakes are a living system, an ever changing ecological process. Those fortunate enough to visit or reside along the shore of a Great Lake for any length of time are sure to recognize that the only constant associated with the shoreline is change. Water levels in the Great Lakes continuously rise and fall and have fluctuated throughout the history of the Great Lakes.
Water Level Fluctations
Historic, Current, and Projected Water Levels
Influences on Great Lakes Water Levels
Water Level Fluctuations
The Great Lakes are a dynamic ecosystem that is constantly changing. Fluctuations in water levels are part of this natural system. Over the centuries, water levels have risen and fallen. The water levels also change with the seasons throughout the year. There is approximately 10-12 inches change between summer and winter. The water levels of the lakes can change a few inches daily depending on the amount of precipitation falling, rate of evaporation, and runoff from the land. Water levels can even changes in a matter of minutes depending on which way the wind blows!