great lakes water levels - noaa

GREAT LAKES WATER LEVELS

John AllisChief, Great Lakes Hydraulics and Hydrology Office

Detroit District, Corps of EngineersDate: 13 Apr 2020

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MONITORING GREAT LAKES WATER LEVELS

Daily Average Water Levels Based on Lake-Wide Average Network• Lake Superior: Duluth, Marquette, Pt. Iroquois, Thunder Bay, Michipicoten• Lakes Michigan-Huron: Harbor Beach, Ludington, Mackinaw City, Milwaukee, Tobermory, Thessalon• Lake St. Clair: St. Clair Shores, Belle River• Lake Erie: Toledo, Cleveland, Port Stanley, Port Colborne• Lake Ontario: Oswego, Rochester, Toronto, Kingston, Port Weller, Cobourg

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ANNUAL WATER LEVELS AND THE HYDROLOGIC CYCLE

WINTER SPRING SUMMER FALL

Snowaccumulation

Snow melt, rainfall,increased runoff

Increasedsunshine warmslake water

Increasedevaporation

4Decade plus of low water with record lows

Record rise and record highs

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5

LAKE SUPERIOR

6

6

LAKE HURON

7

7

LAKE MICHIGAN

8

8

LAKE ERIE

9

9

LAKE ONTARIO

10

PRECIPITATION RANKS FOR GREAT LAKES BASIN

Wettest 12, 24, 48 and 60 month periods in 120 plus years for the Great Lakes

NOAA National Centers for Environmental Information, Climate at a Glance

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6 MONTH WATER LEVEL FORECAST

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6 MONTH WATER LEVEL FORECAST

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6 MONTH WATER LEVEL FORECAST

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6 MONTH WATER LEVEL FORECAST

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6 MONTH WATER LEVEL FORECAST

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HTTPS://WWW.LRE.USACE.ARMY.MIL/ABOUT/GREAT-LAKES-HIGH-WATER/

John Allis313 226 2137

John.t.allis@usace.army.mil