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Flood in Lower Yukon Valley, Alaska
Flood May 21, 2022 – May 30, 2022 · Lower Yukon Valley, Alaska
Where the report was made, with tornadoes recorded within 15 miles over the years.
What the National Weather Service wrote
Water levels on the Innoko River began rising to bankfull on Friday May 20th as floodwaters from an ice jam on the Yukon River started flowing into the Innoko River upstream of Shageluk. Water levels rose overbank in Shageluk on Saturday the 21st as the surge of water moved down the Innoko River, eventually cresting on Tuesday May 24th. Water levels in Shageluk remained above flood stage through May 30th with bankfull conditions persisting into the first week of June. Residents reported water over some roads near the river, including the road to the airport which was impassable and caused the airport to only be accessible by boat. The high water also caused significant erosion of some riverbanks.
The wider storm
An ice jam which formed on the Yukon River 7 miles upstream of Grayling on May 15th resulted in Yukon River floodwaters draining into the Innoko River basin. The influx of water caused the Innoko River to rise overbank and cause minor flooding in the community of Shageluk.
Began near Shageluk (62.6575, -159.5332).
Source: NOAA Storm Events Database, event 1038064. Narratives are written by the National Weather Service forecast office that issued the report.
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