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Updated:January 30, 2026 7:45 am PST

Dense Fog Advisory DENSE FOG ADVISORY  
Nevada County

  Effective: Thu, 1/29 12:41pm Severity:  Moderate 
  Updated: January 30, 2026 7:45 am Urgency: Expected
  Expires: Fri, 1/30 12:00pm Certainty: Likely

Areas Affected: Central Sacramento Valley - Southern Sacramento Valley - Carquinez Strait and Delta - Northern San Joaquin Valley
 
Alert Details:
* WHAT...Visibility one quarter mile or less in dense fog.

* WHERE...Carquinez Strait and Delta, Central/Southern Sacramento
Valley, and Northern San Joaquin Valley.

* WHEN...From midnight tonight to noon PST Friday.

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

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