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Hydrologic Outlook
National Weather Service Fairbanks AK
1118 AM AKDT Thu Sep 3 2026

...HYDROLOGIC OUTLOOK IN EFFECT FROM 4 PM AKDT THIS AFTERNOON THROUGH
SUNDAY AFTERNOON FOR HEADWATER STREAMS OF THE KOYUKUK AND MIDDLE
YUKON RIVER BASINS AS WELL AS THE CHENA RIVER BASIN...

...Locations Impacted...
Central Interior-Nenana-Two Rivers-Middle Yukon Valley-Upper Koyukuk
Valley-Upper Chena River Valley-Fairbanks Metro Area-Goldstream
Valley and Nenana Hills-Lower Koyukuk Valley-Dalton Highway
Summits-Chatanika River Valley-White Mountains and High Terrain South
of the Yukon River-Eielson AFB and Salcha

Areas of 1 to 2.5 inches of rainfall are expected over the next 48
hours due to an atmospheric river. Average return intervals of 2 to 5
years is possible throughout much of the central and western interior
through the weekend. Isolated areas could potentially see heavy
rainfall more in line with 10 to even 25 year return intervals,
resulting in significant rises in the smaller headwater streams that
feed the Koyukuk and Middle Yukon Rivers. While there are no
immediate concerns for the main stem rivers in the area, they will
also see significant rises in water levels through the week as a
result of the expected heavy rainfall with sandbars potentially
becoming covered with water.

Across the Chena River basin, moderate to heavy rainfall of up to 1.5
inches is expected. This will also result in rises along the Chena
and Little Chena rivers. At this time flooding is not expected, but
should the focus for heaviest rainfall shift further east with time,
this could change.

Rainfall rates are expected to decrease by Sunday afternoon across
most of the area.

$$

JL