Aug 5, 2024
Since 2011, Suicide Basin, a side valley that is dammed by the Mendenhall Glacier, fills with water from snowmelt and rainfall then drains during the summer as a glacial outburst flood. This year, the glacier dammed lake in Suicide Basin, like in 4 other years (2018, 2019, 2020 and 2023), was full to the top of the Mendenhall Glacier (top of the ice dam) and started to flow down a side drainage channel on July 31st. After about 4 days, Suicide Basin began to drain sub-glacially as indicated by t
Source: NOAA National Weather Service Storm Events Database (event 1210851). Narrative written by NWS staff at the time of the event.
This event is one of many recorded floods in Juneau Borough County. See the full FEMA flood zone map, NFIP claim totals, and disaster history for the area.