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Updated:December 15, 2025 3:30 am PST

Dense Fog Advisory DENSE FOG ADVISORY  
San Luis Obispo County
Effective: Mon, 12/15 2:42am Severity:  Moderate 
Updated: December 15, 2025 3:30 am Urgency: Expected
Expires: Mon, 12/15 10:00am Certainty: Likely
Areas Affected: Southern Salinas Valley - Santa Ynez Valley
 
Alert Details: 
* WHAT...Visibility one quarter mile or less in dense fog.

* WHERE...Santa Ynez Valley and Southern Salinas Valley.

* WHEN...Until 10 AM PST this morning.

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

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