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Also: Lake St. Clair
  Current Great Lakes-St. Lawrence Water Levels
Current Levels | Weekly Forecast | General Resources | Education | Laws | News |
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Levels Section: Current | Forecasted | Historical
Levels & Hydrology Section: Home | Levels | Hydrology | Flows

 
Current Levels

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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General Resources
Current Month's Daily Lake Averages
U.S. Army Corps of Engineers (USACE), Detroit District
This page displays tabular average Great Lakes water level data for the past four months. You can view the information in feet or meters.

Great Lakes Water Level Photo Gallery
GLERL / Great Lakes Sea Grant Extension Office
Geographically organized, this gallery features both current and historical coastal images and links to related water level updates.

Great Lakes Water Levels
NOAA, Great Lakes Environmental Research Laboratory (GLERL)
Includes historical hydrographs illustrating monthly water levels 1860-present, as well as information about the current situation and the year's outlook.

Hourly Station Levels
Department of Fisheries and Oceans (DFO), Canadian Hydrographic Service
CHS gauging stations' hourly water levels data and graphs for the past and current month. Elevation in meters above chart datum, referenced to IGLD (1985). Data are provisional.

Recent and Forecasted Water Levels on the Great Lakes
Department of Fisheries and Oceans (DFO), Canadian Hydrographic Service
Includes average monthly water levels for the previous year and the current year to date. Period of record is 1918-1996. Elevations are in meters referred to chart datum and IGLD (1985).

Tides and Water Levels
Department of Fisheries and Oceans (DFO), Marine Environmental Data Service
Provides last daily and latest weekly averages. Elevations are in meters IGLD.

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Education
TEACH Great Lakes: Water Levels
Water levels are part of the ebb and flow of nature. Learn about the three types of water level fluctuations, how levels are measured on the Great Lakes, and what's causing the recent drop.

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Laws
The Great Lakes Charter: Principles for the Management of Great Lakes Water Resources
Council of Great Lakes Governors

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News
Advisor
Great Lakes Commission

Focus
International Joint Commission

LEVEL News
Environment Canada, Water Issues Division, Great Lakes-St. Lawrence Regulation Office
Features articles each month about water levels of the Great Lakes and St. Lawrence.

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References
Great Lakes Water Levels Home Page
U.S. Army Corps of Engineers (USACE), Detroit District
A regularly updated page of links to information on Great Lakes hydrology. Includes current conditions, recent water levels, forecasted levels, general news and information, multimedia, reference materials, and more!

Great Lakes Water Level Photo Gallery
GLERL / Great Lakes Sea Grant Extension Office
Geographically organized, this gallery features both current and historical coastal images and links to related water level updates.

Living with the Lakes
U.S. Army Corps of Engineers/Great Lakes Commission
This 40-page full-color publication offers a thorough overview of water \r\nlevel changes, impacts and regulation, as well as advice on shoreline \r\nprotection. Published jointly by the U.S. Army Corps of Engineers-Detroit District and the Great Lakes Commission.

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Related Resources
GLIN: Agencies and Organizations, Hydrology
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 26, 2016
Selected Photos: Copyright ©John and Ann Mahan
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