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Also: Lake St. Clair
 

Great Lakes Levels and Hydrology
What's New | Current Levels | Weekly Levels Forecast | Related Resources
 
Levels & Hydrology Section: Home | Levels | Hydrology | Flows

 
What's New
Collins, area officials continue to oppose Lake Ontario water plan
The Daily News (9/30)
Congressman Chris Collins and the Niagara-Orleans Regional Alliance continue to voice opposition to the International Joint Commission Lake Ontario ó St. Lawrence River Plan.

Rising Water: Major factors driving lake levels can change from year to year
Traverse City Record-Eagle (8/28)
Great Lakes water levels ó and the factors that drive them ó are hard to predict, causing land owners to plan for an unknown future.

Lake Superior water levels: good for boaters, bad for beach seekers
CBC News (8/12)
Boats large and small are having an easier time on Lake Superior this year due to higher-than-average water levels, but high water levels also have an impact on beaches.

Higher water levels impact Great Lakes and inland lakes alike
Gaylord Herald Times (7/29)
There is one thing that is constant when it comes to Michiganís lakes: water levels are always changing.

Lake Huron continues to post above average water levels despite poor rain
Manitoulin Expositor (7/13)
Despite the dry conditions Manitoulin Island, Ont., has experienced so far this summer, Lake Huron is holding its own in the water levels department, posting above-average levels for July.

Rise in Lake Erieís water level puts lake above its long-term average
The Buffalo News (7/10)
Higher water levels are back. Lake Erieís July water levels in 2015 and 2016 are the highest since 1998.

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Great Lakes Real-Time Water Level Gauging Stations

These maps were prepared in partnership with the National Oceanic & Atmospheric Administration (NOAA) and its Center for Operational Oceanographic Products and Services (CO-OPS).

NOAA Logo - Link to NOAA Website
Coordinating Committee Logo - Link to CC Website

Lake Superior | St. Marys River | Lake Michigan | Lake Huron | St. Clair River
Lake St. Clair | Detroit River | Lake Erie | Niagara River | Lake Ontario | St. Lawrence

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Weekly Water Levels Forecast
New! Update for Friday April 15, 2015 (includes data summary)

Weather conditions: The Great Lakes Basin received precipitation several days last week, which contributed to the slightly above average month to date precipitation total of 1.02 inches. Temperatures were colder to start the week throughout the Great Lakes Basin and gradually warmed up later in the week. Heading into the weekend, expect clear skies and warm temperatures throughout the basin. That trend will continue throughout the lower basin heading into the workweek, while some precipitation and lower temperatures are expected in the Lake Superior Basin on Monday.

Lake Level Conditions: Lake Superior is 1 inch higher than it was a month ago. Lakes Michigan-Huron, St. Clair, Erie and Ontario are in the midst of their seasonal rise and are 7 to 8 inches above what they were a month ago. All lakes are above their average levels of a year ago; Lake Superior is 2 inches higher, Lakes Michigan-Huron, St. Clair, and Erie are 10 to 15 inches higher, and Lake Ontario is 20 inches higher than they were at this time last year. All of the lakes are forecasted to rise 2 to 4 inches over the next 30 days. See the Daily Levels page for more water level information.

Forecasted outflows / channel conditions: Lake Superiorís outflow through the St. Maryís River is projected to be above average for the month of April. Lake Michigan-Huronís outflow into the St. Clair River and Lake St. Clairís outflow into the Detroit River are expected to be above average in April. Moreover, the April outflow of Lake Erie into the Niagara River is forecasted to be above average, and outflow of Lake Ontario into the St. Lawrence River is predicted to be above average in April.

Alerts: Official records are based on monthly average water levels and not daily water levels. Users of the Great Lakes, connecting channels and St. Lawrence River should keep informed of current conditions before undertaking any activities that could be affected by changing water levels. Mariners should utilize navigation charts and refer to current water level readings.

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Related Resources
GLIN: Agencies and Organizations, Hydrology
GLIN: Current Great Lakes-St. Lawrence Water Levels
GLIN: Environmental Research in the Great Lakes Region
GLIN: Forecasted Great Lakes-St. Lawrence Water Levels
GLIN: Great Lakes-St. Lawrence Hydrology
GLIN: Great Lakes-St. Lawrence Water Flows
GLIN: Historical Great Lakes-St. Lawrence Water Levels
GLIN: Weather and Climate in the Great Lakes Region

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CC Data This page was created under the guidance of the binational Coordinating Committee on Great Lakes Basic Hydraulic and Hydrologic Data. This symbol is used throughout the GLIN hydrology section to indicate data or references prepared under the auspices of the Coordinating Committee.

 

 
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Updated: September 30, 2016
Selected Photos: Copyright ©John and Ann Mahan
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