Juneau, Alaska (KINY) - The National Weather Service in Juneau has issued a flood warning for a glacier-dammed lake outburst at Mendenhall Lake and Mendenhall River in the central inner channels.
The advisory runs until noon on Monday.
At about 2 p.m. Saturday, trained weather spotters reported that water levels in Suicide Basin above Mendenhall Lake have started to drain and flooding over Mendenhall Lake and Mendenhall River is expected due to a glacier-dammed lake outburst flood. The added water from the glacier-dammed lake into the river system will result in continued river rises.
At 1:15 p.m. Mendenhall Lake was recorded at 5.7 feet. Flood stage is 9 feet. Mendenhall Lake expected to cross minor flood level around 10 p.m. Sunday. The crest of 10.3 feet is expected around 4 a.m. Monday.
At 10 feet water will inundate Mendenhall Campground with up to 3 feet of water covering low areas along with up to 1.5 feet of water covering Skaters Cabin Road. Portions of West Glacier Trail will be impassible. At 9.7 feet there will be roughly 7 inches of water over Skaters Cabin Road between Skaters Cabin and West Glacier Trailhead. Camp 7 will be flooded and water will be over the road between camp 8 and 9 at the Mendenhall Campgrounds.
Nugget Falls Trail will be flooded as that starts to flood at 7.7 feet.