Flood in Middle Yukon Valley, Alaska

Flood May 14, 2026 – May 18, 2026 · Middle Yukon Valley, Alaska

$30K

Damage as recorded

Where the report was made, with tornadoes recorded within 15 miles over the years.

What the National Weather Service wrote

An ice jam near the mouth of the Yuki River released a massive surge of water. As this front surged past Galena and Koyukuk, the Galena river gauge recorded a minor flood crest of 124.8 feet on May 15, before slowly receding into action stage (123.7 feet) by May 17.

The wider storm

The primary breakup front from the Upper Yukon tracked down through the middle section of the Yukon during the middle part of May. While some snowmelt flooding remained over parts of the Upper Yukon, primary dynamics shifted to significant mechanical ice jam releases, notably near the mouth of the Yuki River jam, which caused rapid surges downstream.

Began near Koyukuk (64.8231, -157.8151).

Source: NOAA Storm Events Database, event 1342834. Narratives are written by the National Weather Service forecast office that issued the report.

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