Second glacial outburst flood expected to cause ‘minor flooding’ in Juneau

Juneau braces for another glacial outburst flood, one month after record-setting deluge

The Mendenhall River at flood levels seen after the glacial outburst flooding event on Aug 13, 2025 (Photo by Corinne Smith/Alaska Beacon)A second glacial outburst flood is bearing down on Alaska’s capital city, barely a month after record-deep floodwater came close to overrunning temporary flood barriers. On Monday, the National Weather Service issued a flood warning for Juneau’s Mendenhall Valley after river and lake measurements showed signs …

Second glacial outburst flood expected to cause ‘minor flooding’ in Juneau

The National Weather Service issued a flood warning Monday morning, saying that water gauges indicate the Suicide Basin had started to release into Mendenhall Lake.

Juneau under flood warning for a secondary glacial outburst flood

The Mendenhall Lake and River hours after the 2025 glacial outburst flood in Juneau on Wednesday, Aug. 13, 2025. (Photo by Clarise Larson/KTOO) This story has been updated. A second, minor glacial lake outburst flood is underway in Juneau. Water levels in the Mendenhall Lake and River are slated to crest sometime Tuesday morning.  The National Weather Service issued a flood warning Monday morning after indications that the water in Suicide Basin…

Flood warning for Mendenhall Lake and River as glacier-dammed lake outburst expected

The flood warning for the Mendenhall Lake and River remains in effect through Tuesday morning

NWS issues flood warning as Suicide Basin releases

Juneau Empire Juneau Empire - The Voice of Alaska's Capital Since 1912 A crest between 11 to 12 feet is expected Tuesday morning NWS issues flood warning as Suicide Basin releases Chloe Pleznac