by Forum News Service

DULUTH — The level of Lake Superior keeps rising, and it started this month 2 inches above the long-term normal and 14 inches above the level at this time last year.

The big lake rose 4 inches in April, a month it usually rises by 3 inches. The lake’s monthly average for April was the highest since 1998, according to the International Lake Superior Board of Control.

The increase is expected to continue through at least May, officials said Friday, with water supplies to the lake well above normal. That means more rain and snow, more water flowing in from rivers and less water evaporating, probably in part because of an unusually broad cover of ice.

The extra water is helping lakes Huron and Michigan, too. Those lakes rose 8 inches in April, double the usual rise for the month.