Washington Moderate Dense Fog Advisory | Effective 10/05/2026 04:59

Headline: 
Dense Fog Advisory issued October 5 at 4:59AM PDT until October 5 at 12:00PM PDT by NWS Seattle WA
Event: 
Dense Fog Advisory
Urgency: 
Expected
Effective: 
October 5, 2026 - 4:59am
Expires: 
October 5, 2026 - 12:00pm
Description: 
* WHAT...Areas of visibility one half mile or less in dense fog. * WHERE...Grays Harbor County Coast, Lower Chehalis River Valley, Middle Chehalis River Valley, Foothills and Valleys of Pierce and Southern King Counties, Foothills and Valleys of Thurston and Lewis Counties, Lowlands of Lewis and Southern Thurston Counties, Lowlands of Pierce and Southern King Counties, Olympia and Southern Puget Sound, and Willapa and Black Hills. * WHEN...Until noon PDT today. * IMPACTS...Low visibility could make driving conditions hazardous.
Instruction: 
If driving, slow down, use your headlights, and leave plenty of distance ahead of you.
Area Description: 
Foothills and Valleys of Pierce and Southern King Counties; Foothills and Valleys of Thurston and Lewis Counties; Lowlands of Pierce and Southern King Counties; Olympia and Southern Puget Sound; Lowlands of Lewis and Southern Thurston Counties; Middle Chehalis River Valley; Willapa and Black Hills; Grays Harbor County Coast; Lower Chehalis River Valley
Forcast Office: 
NWS Seattle WA
Sender: 
w-nws.webmaster@noaa.gov