The flood came, the water rose, and this time Juneau got to exhale. The glacial outburst from Suicide Basin crested at 14.7 feet on the Mendenhall Lake gauge at 2:15 p.m., KTOO reported Thursday [1], far below what the city had braced for. The National Weather Service in Juneau had forecast a crest between 16.1 and 16.6 feet, close under the 16.65-foot record set in 2025 [2]. The water stopped 1.4 feet short of even the low end of that range.
"We have crested officially, and we are now on the way back down," National Weather Service meteorologist Zoe Kaplan announced, adding, "we did it, Juneau" [1].
The margin mattered to a lot of doorsteps. Around 2,000 homes sat in this year's evacuation zone [1], and the city had recommended that residents in the flood zone evacuate Wednesday [2]. When the water began falling, only a handful of residents reported damage, though officials are still tallying [1].
The mechanism behind the threat is simple and relentless. "The glacial outburst flood starts when the water pressure in an ice-dammed pool called Suicide Basin builds up so much that it carves through the ice," as KTOO describes it [1]. This year the defenses held with room to spare: in one backyard the water never touched the HESCO barriers that make up the flood wall, and the HESCO barriers below Brotherhood Bridge are new [1].
For the people in the flood's path, the gauge reading translated into something more personal. "For months it was like this slow-moving bullet coming straight at me, and didn't know if it was going to be a hit or a miss," said Ann Lind, a resident on Marion Drive; the day of the crest, she said, "it's a miss" [1]. Mandy Mallott, a View Drive resident, gave the credit to the people around her: "The emotions that are running through us are a big sense of relief and thankfulness to our friends and our neighbors that we got through the night and this gorgeous day together" [1].
The relief has a shelf life, and Juneau knows the terms. The threat ends only when the Mendenhall Glacier retreats past the basin, which could take an estimated 25 years [1]. The city has lived through disastrous floods over the past three years [1], the tally of this year's damage is not finished, and the handful of households that did take losses are starting repairs while their neighbors put away sandbags. A miss is worth celebrating; the basin does not know that, and next summer the same gauge gets watched again.
