Great Lakes Water LevelsJuly 4th, 2014 at 2:39 pm by Bill Steffen under Bill's Blog, News, Weather
Picture of Lake Superior between Marquette and Munising by Michelle Olin. Lake Michigan/Huron is up 4″ in the last month, up 14″ in the last year and just 5″ below the century average (that should drop to -4 or -3 this month). Lake Superior is up 2″ in the last month, up 13″ year-to-year and is now 6″ above average level. Lake Erie is up 1″ in the last month, up 5″ in the last year and is now 4″ above the long-term average. Lake Ontario is down 2″ in the last month, down 1″ year-to-year and is 6″ above the century average. Lake St. Clair is up 3″ in the last month, up 7″ year-to-year and is 3″ above the long-term average. Flow down the St. Mary’s River from Lake Superior into Lake Michigan/Huron will remain above average through July. River levels in West Michigan remain above average flow. The Grand River in Grand Rapids is falling very slowly and is at 4,600 cfs compared to an average flow of 2,740 cfs. Lake Michigan beach water temperatures are in the 60s. The mid-Lake Michigan buoy west of Holland (east-southeast of Milwaukee) shows a water temp. of 51°.