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🟡 Moderate
Dense Fog Advisory
Middle Chehalis River Valley; Lower Chehalis River Valley
Dense Fog Advisory issued October 31 at 8:29PM PDT until November 1 at 10:00AM PST by NWS Seattle WA
Alert Description
* WHAT...Visibility one quarter mile or less in dense fog. * WHERE...Lower Chehalis River Valley and Middle Chehalis River Valley. * WHEN...Until 10 AM PST Sunday. * IMPACTS...Low visibility could make driving conditions hazardous.
Safety Instructions
If driving, slow down, use your headlights, and leave plenty of distance ahead of you.
Time Information
Effective
Nov 1, 2026, 6:00 AM
Expires
Nov 1, 2026, 12:00 PM
Issued
Nov 1, 2026, 3:29 AM
Alert Details
Severity
Moderate
Urgency
Expected
Certainty
Likely
Category
Met
Issued By
NWS Seattle WA
National Weather Service