Mendenhall Glacier outburst sends record water surge into Alaska's capital city

news image
Special Stories
14 Aug 2025 8:55 PM

According to the National Weather Service (NWS) in Juneau, Alaska, the Mendenhall River crested at a record level of 16.65 feet (major flood stage). This level exceeds the 2024 record of 15.99 feet. Anyone living in the 17-foot lake level inundation zone should evacuate to higher ground.

The NWS issued a Flood Warning for the Mendenhall River.

Mendenhall River

Once the glacial outburst occurred it sent a wall of water downstream toward Juneau, AK. Notice the rapid rise in the Mendenhall River to over 16 feet.

What is a Glacial Outburst?

This is not your typical flooding from heavy rain. Meltwater from glaciers settles into pools and then gets dammed by ice and debris. These pools grow and the volume of water increases until they reach the breaking point. This can happen every year.

These outbursts can cause significant loss of life and property.

Stay with WeatherNation for the latest.

All Weather News
More
Record-Breaking Heat Builds Out West

Record-Breaking Heat Builds Out West

You may have heard the news but a large heatw

14 Mar 2026 2:30 AM
Multiple Systems Bring Gusty Winds, Heavy Snow to the Midwest

Multiple Systems Bring Gusty Winds, Heavy Snow to the Midwest

After severe storms slammed the Midwest earli

14 Mar 2026 2:15 AM
Eyes on the End of the Weekend: Renewed Storm Threat for the Plains

Eyes on the End of the Weekend: Renewed Storm Threat for the Plains

A large, high-impact storm system will work f

14 Mar 2026 2:15 AM
Fire Weather Risk for the Plains

Fire Weather Risk for the Plains

A strong ridge of high pressure building over

14 Mar 2026 2:05 AM
Peak Cherry Blossom Forecast Released for 2026

Peak Cherry Blossom Forecast Released for 2026

Top Image Credit: National Parks ServiceSprin

13 Mar 2026 8:55 PM
Destructive Tornadoes, Hail From Multi-Day Severe Outbreak

Destructive Tornadoes, Hail From Multi-Day Severe Outbreak

Severe storms continued into this morning, wi

13 Mar 2026 2:10 AM
Significant Severe Weather Threatens Again Wednesday

Significant Severe Weather Threatens Again Wednesday

On the heels of an active opening week to Met

12 Mar 2026 2:30 AM