Lake Superior continued its 2010 decline from normal water levels and now sits 13 inches below normal for June 1, and 8 inches below the 2009 level at this time.
The International Lake Superior Board of Control reported Thursday that well-below-normal rainfall across the Lake Superior watershed in May again contributed to a slower-than-normal rise in the lake level. The lake increased just an inch in May when it usually goes up 4 inches.
Lake Superior generally rises from April to September and then drops through the winter. But this year's spring/summer rise is happening more slowly than usual. The big lake has been trending down for months, as have other Great Lakes, and lower water levels eventually could have impacts on recreational boating and shipping.
Lakes Michigan and Huron rose 2 inches in May compared to the usual 3-inch increase and now sit 15 inches below the long-term average and 9 inches below June 1, 2009.
