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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
15 years later, Great Lakes levels rebound
Michigan Radio (10/1)
The quick recovery has stifled an effort to engineer a solution to the problem of low lake levels in Huron and Michigan. But proponents say it would be shortsighted to forget about the issue.

Lakes Michigan and Huron surge to highest water levels in 15 years
MLive (9/24)
After almost two years of historically low water levels on Lake Michigan and Lake Huron, water levels have recovered to heights not seen in 15 years.

High water levels mean high risks at Lake Michigan piers
Holland Sentinel (9/24)
High winds along the lakeshore draw people to the beaches to watch the high waves, but with the water levels on Lake Michigan at their highest point in almost 15 years, the danger of being swept off the piers has increased.

EDITORIAL: Proceed with Plan 2014: Proposal can sensibly regulate waterways, mitigate flooding
Watertown Daily Times (9/23)
The International Joint Commission has urged the U.S. and Canadian governments to adopt its Plan 2014. This would make these waterways healthier and prepare for climate change by regulating the extreme high and low water levels and follow their natural, seasonal flows.

Lake Ontario south shore lawmakers urge John Kerry to block Plan 2014
Watertown Daily Times (9/22)
Set to replace a half-century-old water regulation plan, the U.S.-Canadian International Joint Commission’s “Plan 2014” proposal has drawn criticism from eastern and southern lakeshore communities because of increased risks of flooding and coastal property damage.

St. Lawrence, Lake Ontario levels debate moves to Washington
North Country Public Radio (9/17)
The effort to update the 55-year-old plan for managing water levels on the St. Lawrence River and Lake Ontario in Northern New York is coming to a close.

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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 September 19, 2014 (includes data summary)

Weather conditions: Fall like weather arrived in the Great Lakes basin this week. Other than some light precipitation to start the work week, conditions were largely dry across the region. Look for scattered showers at times this weekend accompanied by warmer temperatures. To date in September, the Great Lakes basin as a whole has received above average precipitation.

Water Level Conditions: Lakes Superior and Michigan-Huron are 9 and 19 inches, respectively, above their levels of a year ago. Lakes St. Clair and Erie are 14 and 7 inches, respectively, above what they were at this time last year, while Lake Ontario is 1 inch above its level from a year ago. Lakes Superior and Michigan-Huron are predicted to fall 1 and 2 inches, respectively over the next month. Lakes St. Clair, Erie, and Ontario are projected to fall 6, 5, and 6 inches, respectively, over the next 30 days. See the Great Lakes Water Levels web page for more water level information.

Forecasted outflows / channel conditions: Lake Superior’s outflow through the St. Mary’s River is forecasted to be well above average for the month of September. Lake Michigan-Huron’s outflow into the St. Clair River and Lake St. Clair’s outflow into the Detroit River are predicted to be near average in September. In addition, the outflow of Lake Erie into the Niagara River and Lake Ontario’s outflow into the St. Lawrence River are projected to be above average in September.

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: October 2, 2014
Maintained by: Christine Manninen, manninen@glc.org
Selected Photos: Copyright ©John and Ann Mahan
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