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Hydrologic Outlook
National Weather Service Anchorage AK
202 PM AKDT Thu Aug 28 2025

...SIGNIFICANT RAINFALL THROUGH FRIDAY WILL BRING RIVER RISES AND
LOCALIZED FLOOD POTENTIAL ACROSS SOUTHCENTRAL ALASKA...

Rainfall

* Eastern Kenai Peninsula and Prince William Sound: 1 to 3 inches of
  rain has already fallen as of Thursday afternoon with another 1 to
  2
  inches possible through Friday. Locally higher amounts are
  possible in higher terrain.

* Mat-Su: 1 to 3 inches of rain have fallen as of Thursday afternoon
  with another 1 to 2 inches of rain expected through Friday. The
  highest amounts will be across the northern Susitna Valley and
  across the higher terrain of the Talkeetnas. The Matanuska Valley
  will generally receive 1 to 2 inches of total rainfall by the end
  of the event, with the higher totals occuring towards Sutton and
  Chickaloon.

* Western Kenai Peninsula and Anchorage: Half an inch to 1.5 inches
  has already fallen across much of this area as of Thursday
  afternoon, with upwards of 3 inches in Anchor Point. Another half
  to 1 inch is possible through Friday.

Hydrologic Concerns

* Sharp rises have already been noted on many area streams and
  rivers. Many smaller streams will crest Thursday night into Friday
  while larger rivers or downstream points may crest Friday and
  Saturday. Higher than normal water levels may continue through
  Labor Day Weekend into next week.

* Many lower locations along rivers such as gravel bars and other
  spots popular for camping and recreating are likely to become
  inundated with water.

* Heavy rain may result in localized ponding in low-lying areas and
  locations with poor drainage.

Next Steps

* Residents along area streams as well as river users and
  recreationists should anticipate higher than normal water levels
  and are advised to monitor weather and river forecasts.

* Reports on river conditions may be sent to the river forecast
  center by calling 1-800-847-1739.

$$