Updated Great Lakes Water LevelsFebruary 28th, 2013 at 7:17 pm by Bill Steffen under Bill's Blog, News, Weather
The picture here is the Big Red Lighthouse at Holland from “Deb” at ReportIt. Check out the picture bigger than full screen. Above average precipitation in the Great Lakes has brought lake levels up in the last few weeks. Only Lake Superior, where temperatures have been below freezing (no snowmelt) has gone down 2 inches in the last month. Lakes Michigan, Huron and Erie are all up 2″ in the last month and Lake Ontario is up 3″ in the last month. Lake Superior is one inch higher than it was last year on March 1. Lake Michigan/Huron (the two lakes behave as one big lake – connected up at the Mackinac Bridge) is one foot lower than one year ago and 26″ below the long-term average. Lake Michigan is now 2″ ABOVE the lowest March lake level, which occurred in 1964. Lake Erie is 7″ below average and Lake Ontario is 5″ below average. Again, I want to point out that if you hear that the reason that Lake Michigan’s (and Lake Huron’s) water level has dropped is the below average snowfall last winter…that statement is easily proved false. Precipitation (rain and melted snow) was above average over much of the Lake Michigan/Huron basin last winter (less snow, but more rain) and precipitation over the basin has been above average for 7 of the past 12 years. If you haven’t read them, you should read this article and this article. You can check out Michigan stream and river flow here. With cool temperatures over the weekend, we’ll continue to track the possibility for ice jams on Michigan rivers.