MPR’s Dan Kraker reports that after more than a decade of falling water levels, Lake Superior is on the upswing. For 14 years, water levels in Lake Superior, the world's largest freshwater lake, remained below their long-term average, the longest stretch of below-average levels in recorded history. The big lake reached its all-time low in 2007.

In the spring of 2013, Lake Superior rose by 20 inches, fueled by massive runoff from big rain and snowstorms. That was one of the largest seasonal rises ever recorded since measurements began in 1918. Typically the lake rises only about a foot when the snow melts.