Great Lakes Water Levels

October 25th, 2013 at 9:26 am by under Bill's Blog, Weather

Lake-Effect Showers Yuba Farms near TVC Oct. 2013  Click on the picture to enlarge.  These are lake-effect snow/sleet showers coming off of Lake Michigan (pic. from and NBC Traverse City).  The water level of Lakes Superior, Michigan and Huron all dropped an inch in the last month.   Lake Erie fell 5″ in the last month and Lake Ontario was down 4″.  All of the Great Lakes are significantly higher than one year ago.  Lakes Michigan, Huron and Erie are all 9″ higher than one year ago, Lake Superior is up an even foot and Lake Ontario is 13″ higher year-to-year.  Lake Superior remains 2″ below their century average.  Lake Erie is down one inch and Lake Ontario is up one inch from the long-term average.  Lake Michigan/Huron is 17″ below the century average.  Of course, lake-effect precipitation does not increase lake levels.  If anything an overall dry and cool pattern will lower lake levels, though the pattern we are in with lots of clouds and relatively high humidity will lower evaporation rates.

One Response to “Great Lakes Water Levels”

  1. DF (SE Mich) says:

    The whole basin looks like it is going to get plenty of rain next week at a time when lake levels fall. Hopefully it can level it out some.

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