Great Lakes Advanced Hydrologic Prediction System (AHPS) Products (Experimental)

See also: National Weather Service AHPS(ervice)

GLERL’s AHPS is a semi-automated system combining near real-time data with a suite of mathematical models developed to simulate the current state of basin hydrology. Water levels as well as hydrologic variables are forecast from one to nine months in the future for the Great Lakes, Lake St. Clair, and Georgian Bay.

Due to technical issues with the data feed, AHPS forecasts are currently unavailable. We hope to have the issues resolved soon. Thank you!

Please note that the official lake level forecasts are available in the U.S. Army Corps of Engineers Detroit District Monthly Bulletin of Great Lakes Water Levels.

More information on the background and methods of generating an outlook is also provided.

For more information contact:

Tim Hunter, IT Specialist
734-741-2344
e-mail:

Drew Gronewold, Research Hydrologist
734-741-2444
e-mail: