The following links provide excellent information about Great Lakes water levels.
U.S. Army Corps of Engineers
International Upper Lakes Study
National Oceanic and Atmospheric Administration
Great Lakes Environmental Research Laboratory:
Ecosystem forecasting predicts the effects of biological, chemical, physical, and human-induced changes on ecosystems and their components. These forecasts, both qualitative and quantitative, offer scientifically sound state-of-the-art estimations of likely outcomes.
Monthly and Seasonal Forecasts
Ontario Centre For Climate Impacts and Adaptation Resources
The Ontario Centre for Climate Impacts and Adaptation Resources (OCCIAR) is a university-based, resource hub for researchers and stakeholders searching for information on climate change impacts and adaptation: