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Orange County Under Dense Fog Advisory Through Friday Morning

Drivers face sharply reduced visibility that typically improves by late morning as fog dissipates.

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foggy rural asphalt highway perspective with white line, misty road, Road with traffic and heavy fog, bad weather driving
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The National Weather Service released a dense fog advisory at 7:21 p.m. on Thursday valid from 10 p.m. until Friday Oct. 31, at 9 a.m. for Orange County Coast.

Overview

  • The National Weather Service issued a dense fog advisory for the Orange County Coast from 10 p.m. Thursday to 9 a.m. Friday, warning of visibility dropping to one-quarter mile or less.
  • The advisory cautions of hazardous travel on I-405 and I-5 and notes that air travel may be affected.
  • NWS guidance urges motorists to slow down, use low-beam headlights, increase following distance, and pull over in near-zero visibility.
  • On Thursday morning, NWS offices also posted dense fog advisories across nine states—including Iowa, Nebraska, Minnesota, Wisconsin, Illinois, Missouri, Kansas, Idaho, and Washington—affecting more than 1 million travelers.
  • Forecasters noted a secondary risk where temperatures are below freezing, with NWS Omaha warning that bridges and overpasses could develop slick spots.