Water Level Advisory. Daily Mean 573.02 Lake Michigan water level information as of 11/20/2020. Great Lakes and Montreal Harbour. The six-month water level forecasts show a high-end forecast that could surpass all other modern water levels for some of the Great Lakes. Great Lakes Water Levels (Feet) This report was generated at (Eastern): Saturday December 5 2020 2:31 PM 01-DEC-2020 02-DEC-2020 03-DEC-2020 04-DEC-2020 05-DEC-2020 Date 602.66 602.62 602.61 Daily Mean 581.21 581.26 581.31 576.34 576.36 576.23 Daily Mean Daily Mean Daily Mean Adj. Date: 13 Apr 2020 It ⦠LANSING â Water is rising along Michigan's prized Great Lakes shoreline, shrinking beaches, eroding dunes, flooding campgrounds, costing millions. In May 2020, the lake level was 13 inches below last May. Going through winter with less ice coverage on the lakes would generally mean more evaporation could take place. Monthly Bulletin prepared by the Canadian Hydrographic Service Fisheries and Oceans Canada. Lake St. Clair sat about 3 ⦠GLCFS FORECAST: 12/05/2020 (DOY 340) 1200 GMT - Experimental Forecasts updated by about 0130 and 1330 GMT (subtract 4 for EDT, 5 for EST) Other Wave Forecasts: WaveWatch III , NWS Great Lakes , NWS NDFD John Allis. Chief, Great Lakes Hydraulics and Hydrology Office. October 2020. 2019 was bad and 2020 is ⦠Detroit District, Corps of Engineers. Water levels can rise and fall rapidly in Port Clinton when a wind-driven phenomenon called a âseicheâ sloshes the lake water back-and-forth along Lake Erieâs long, shallow axis. The Army Corps of Engineers â Detroit Districtâs reports as of October 2020 for Great Lakes Water Levels and Great Lakes Water Level History. High water levels on all the Great Lakes to start 2020 All the Great Lakes have declined since their annual high levels, however the December water level was either the second or third highest on all the lakes for the period of record (1918-2018). GREAT LAKES WATER LEVELS. 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