Lake Superior rises twice normal rate
Lake Superior rose by six inches in June, double the usual increase for the month, and now sits 15 inches above its July level last year.
The International Lake Superior Board of Control reports that Lake Superior is five inches below its average level for July.
Rainfall during June, especially the first half of the month, was well above normal, helping fill the tributaries and eventually the big lake itself. Duluth received 5.21 inches of rain in June, an inch more than usual.
Except for a few dry winter months, Lake Superior has been on a rapid rise toward normal levels since September after setting a new monthly low water level record in August and brushing with the 80-year-old low water record in April 2007.
Lakes Michigan and Huron rose six inches in June, when they on average rise two inches, and now sit six inches higher than July 2007 but still 14 inches below their long-term average.