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Sunday, May 24, 2026 11:43:56

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2026-05-2411 1638
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Dense Fog Advisory 0004
Issued by the Seattle Forecast Office

Action Issued Starts Expiration
New 2026-05-17 09:22:46 2026-05-17 09:22:00 2026-05-17 14:00:00
Cancelled 2026-05-17 11:31:21 2026-05-17 14:00:00


Action: New
Issued At: 2026-05-17 09:22:46

479 
WWUS76 KSEW 171422
NPWSEW

URGENT - WEATHER MESSAGE
National Weather Service Seattle WA
722 AM PDT Sun May 17 2026

WAZ317>319-332-171900-
/O.NEW.KSEW.FG.Y.0004.260517T1422Z-260517T1900Z/
Olympia and Southern Puget Sound-Lowlands of Lewis and Southern
Thurston Counties-Middle Chehalis River Valley-Lower Chehalis
River Valley-
Including Hoquiam, Fords Prairie, Elma, Aberdeen, Grand Mound,
Chehalis, Lacey, Tumwater, Olympia, Rochester, Montesano, and
McCleary
722 AM PDT Sun May 17 2026

...DENSE FOG ADVISORY IN EFFECT UNTIL NOON PDT TODAY...

* WHAT...Visibility one quarter mile or less in dense fog.

* WHERE...Lower Chehalis River Valley, Middle Chehalis River Valley, 
  Lowlands of Lewis and Southern Thurston Counties, and Olympia and 
  Southern Puget Sound.

* WHEN...Until noon PDT today.

* IMPACTS...Low visibility could make driving conditions hazardous.

* ADDITIONAL DETAILS...The fog will primarily impact areas along the 
  I-5 corridor, US-101, and US-12 within the advisory area.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If driving, slow down, use your headlights, and leave plenty of 
distance ahead of you.

&&

$$

HPR


Action: Cancelled
Issued At: 2026-05-17 11:31:21

508 
WWUS76 KSEW 171631
NPWSEW

URGENT - WEATHER MESSAGE
National Weather Service Seattle WA
931 AM PDT Sun May 17 2026

WAZ317>319-332-171745-
/O.CAN.KSEW.FG.Y.0004.000000T0000Z-260517T1900Z/
Olympia and Southern Puget Sound-Lowlands of Lewis and Southern
Thurston Counties-Middle Chehalis River Valley-Lower Chehalis
River Valley-
Including Hoquiam, Fords Prairie, Elma, Aberdeen, Grand Mound,
Chehalis, Lacey, Tumwater, Olympia, Rochester, Montesano, and
McCleary
931 AM PDT Sun May 17 2026

...DENSE FOG ADVISORY IS CANCELLED...

The fog has dissipated. Therefore the advisory is cancelled.

$$

HPR



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