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2025 mendenhall glacier flood event; juneau, alaska

NOAAORR-11048

issued: 2025-08-12 00:00Z
status: cancelled 2025-08-26 00:00Z
self-cancels: 2025-08-26 00:00Z
authority: NOAA OR&R
sea: The Coastal Waters of Southeast Alaska and British Columbia
position: 58.387, -134.589
source: incidentnews · first seen 2026-09-03 15:09Z

Original warning text

2025 Mendenhall Glacier Flood Event; Juneau, Alaska.
Juneau, AK 99801, USA.
1. August 12, 2025: The National Weather Service announced a glacier outburt flood event has begun. Mendenhall lake levels are also showing a release has started. A crest is expected around Wednesday afternoon (August 13) near record levels of somewhere between 16.3 and 16.8ft.
2. THREAT: OTHER.
3. POSITION 58.387N 134.589W. NOAA INCIDENTNEWS 11048: https://incidentnews.noaa.gov/incident/11048

This area · spills & pollution incidents

95 within 180 nm since 1986 · 6 in the last 12 months · 0 in force now

Mendenhall glacier flood outburst 2026; juneau, alaska2026-08-11
On july 23, 2026, the U.S2026-07-23
Coast guard MH-60 helicopter, air station sitka; sitka, alaska2026-06-22
103 metlakatla st, sitka, ak 99835, USA2026-01-12
Juneau, ak, USA2025-12-31
On 9/24/25, the U.S2025-09-24

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Timeline · 2 messages since 2025-07-30 · closed 2025-08-26

Juneau, ak 99801, USA2025-07-30 → 2025-08-13
2025 mendenhall glacier flood event; juneau, alaska this message2025-08-12 → 2025-08-26

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