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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
Rising Lake Erie damages property, swallows beaches
Buffalo News (7/27)
Its depth ballooned in June and July because of as much as 400 percent more rainfall in some areas of the Great Lakes watershed this spring and summer.

Lake Michigan water levels rapidly rise after record lows
Milwaukee Journal Sentinel (7/23)
Water levels on Lake Michigan have undergone a remarkably quick transformation and are now more than 3 feet higher than January 2013 when they hit an all-time low.

Beaches losing ground as lake levels rise
The Sheboygan Press (7/22)
Tourists returning to Sheboygan, Wisc. this year have noticed something a little unusual about the lakefront: the beaches seem to be shrinking.

High lake levels vex docking for Mackinac sailboat race
Detroit News (7/16)
Race committee officials issued a warning that some docking facilities may not be available on Mackinac Island because of higher water levels.

Lake Michigan, Lake Huron water level at 17-year high
MLive (7/16)
Overall, the water level in Lakes Michigan and Huron reached 579.7 feet in June ó a height not seen since since September 1998.

Windsor-Essex conservation authority warns of high lake water levels
Windsor Star (7/15)
The Essex Region Conservation Authority is urging homeowners to plan for potential flood damage with lake water levels reaching a 17-year high.

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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 June 5, 2015 (includes data summary)

Weather conditions: Over the past 7 days the eastern and southern portions of the basin saw significant rainfall. Over 3 inches of rainfall were reported over a 24 hour period on Sunday in parts of southern Michigan and northern parts of Indiana and Ohio. The wet week contributed to a basin wide rainfall total that was 15 percent above average for the month of May .As a whole, the basin was cooler than average for this time of the year. Over the next 7 days, precipitation will be between 0.25 and 1.75 inches with the highest amounts being in the Upper Peninsula of Michigan and New York. The weekend will see temperatures rising into the 70s over much of the basin. Temperatures through Wednesday wil l be into the 70s and 80s with cooler temperatures along the lake shore.

Lake Level Conditions: Lakes Superior and Michigan - Huron are 1 and 1 2 inches, respectively, above their levels of a year ago . Lake St. Clair is 7 inches above its level a year ago, L ake Erie is 1 inch above its level a year ago, and Lake Ontario is 1 1 inches lower than what it was at this time last year. Lakes Superior and Michigan - Huron are forecast ed to climb 2 inches over the next month , Lakes St. Clair and Erie are expected to stay at the same level and Lake Ontario is projected to rise 3 inches during 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 predicted to be above average for the month of June . Lake Michigan - Huronís outflow into the St. Clair River and Lake St. Clairís outflow into the Detroit River are forecasted to be above average in June . The June outflow of Lake Erie into the Niagara River is projected to be above average, but Lake Ontarioís outflow into the St. Lawrence River is expected to be below average in June .

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. Ice information can be found at the National Ice Center's webpage.

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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: August 3, 2015
Maintained by: Christine Manninen, manninen@glc.org
Selected Photos: Copyright ©John and Ann Mahan
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