Lake St. Clair is up 3″ in the last month, up 9″ in the last year and the level is 20″ above the July average.
The water level of Lake Michigan/Huron (one giant lake at the same water level – connected by the Mackinac Bridge) is up 2″ in the last month and up 7″ year-to-year.
It’s now 17″ above the July average, but 15″ below the highest July level recorded in 1986. The lake is 48″ higher than the lowest July level ever – that occurred in 1964.
Lake Superior is also up 2″ in the last month. Superior is 2″ higher than it was one year ago and is now 10″ above the long-term July average.
Lake Erie is unchanged in the last month, but up 11″ in the last year. Erie is 19″ above the July average.
Lake Ontario has been at record high levels…today it’s one inch below the July record level set in 1947. Ontario is down 8″ in the last month, up 29″ in the last year and it stands at 25″ above the July average.
Lake Ontario recently set a record for the highest water level ever. The the other Great Lakes are at the highest they have been since the 1990s.
All the rivers connecting the Great Lakes have above average flow and that should continue through the rest of the summer and into the fall.
The flow on the Grand River at Grand Rapids as I write this is 1,570 cubic feet per second – compared to an average flow for July 30 of 1,760 cfs. The Kalamazoo River at Comstock is at 514 cfs compared to an average of 566 cfs.
The Muskegon River is higher relative to average… at Croton the flow is 1,670 cfs compared an an average of 1,180 cfs. There was some significant rain the middle of last week in the upper Muskegon basin.