Coastal Flood Advisory

Coastal Hazard Message
National Weather Service Seattle WA
819 PM PST Tue Dec 9 2025

WAZ001-310-311-101230-
/O.CON.KSEW.CF.Y.0011.251210T1500Z-251210T2100Z/
San Juan County-Lowlands of Western Whatcom County-
Lowlands of Western Skagit and Northwestern Snohomish Counties-
819 PM PST Tue Dec 9 2025

...COASTAL FLOOD ADVISORY REMAINS IN EFFECT FROM 7 AM TO 1 PM PST
WEDNESDAY...

* WHAT...Minor coastal flooding expected. Inundation of around 2
  feet above ground level is possible along shorelines and low-
  lying coastal areas.

* WHERE...San Juan County, Lowlands of Western Whatcom County
  and Lowlands of Western Skagit and Northwestern Snohomish
  Counties zones.

* WHEN...From 7 AM to 1 PM PST Wednesday.

* IMPACTS...Minor coastal flooding due to tidal overflow is
  expected around high tide. This may lead to flooding of
  parking lots, parks, and roads, with only isolated road
  closures expected.

* ADDITIONAL DETAILS...Coastal flooding will occur in the hours
  around the morning high tide.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If travel is required, allow extra time as some roads may be
closed. Do not drive around barricades or through water of
unknown depth. Take the necessary actions to protect flood-prone
property.

Inundation above ground level refers to the height above the Mean
Higher High Water (MHHW) level.

&&

$$

Coastal Hazard Message
National Weather Service Portland OR
458 PM PST Tue Dec 9 2025

WAZ201-101800-
/O.EXP.KPQR.CF.Y.0009.000000T0000Z-251210T0100Z/
/O.NEW.KPQR.CF.Y.0010.251210T1800Z-251211T0300Z/
South Washington Coast-
458 PM PST Tue Dec 9 2025

...COASTAL FLOOD ADVISORY IN EFFECT FROM 10 AM TO 7 PM PST
WEDNESDAY...

* WHAT...Tidal overflow flooding expected.

* WHERE...South Washington Coast.

* WHEN...From 10 AM to 7 PM PST Wednesday.

* IMPACTS...Minor flooding, up to one foot above ground level,
  during high tides is expected in the low lying areas near bays,
  sloughs, and the lower reaches of the coastal rivers.

* ADDITIONAL DETAILS...While the Toke Point tidal gauge is
  expected to rise to near 9.5 ft early Wednesday morning, river
  levels are expected to drop below the 80% of flood flow
  threshold at that time. The Toke Point tidal gauge is expected
  to peak again near 9.5 ft around Wednesday afternoon. The
  Willapa River will likely remain above 80% of flood flow during
  the Wednesday afternoon high tide. This will temporarily
  increase chances for tidal overflow flooding around high tide
  Tuesday afternoon along the south Washington, north Oregon and
  central Oregon coast in the low lying areas near bays, sloughs,
  and lower reaches of the coastal rivers.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Coastal Flood Advisory means that tidal overflow flooding is
expected. Coastal residents in the warned area should be alert
for rising water, and take appropriate action to protect life and
property.

&&

$$