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3mo ago

NWS Issues Morning Fog Advisories for Parts of Oregon and the Inland Empire

The alerts highlight quarter-mile visibility with icing from freezing fog alongside potential air-quality problems for sensitive groups.

Orange County Coast, Orange County, San Diego County Coastal Areas and San Diego County Inland Valleys are under a dense fog advisory which was issued by the National Weather Service on Wednesday at 2:13 a.m. The advisory is in effect until 9 a.m.

Overview

  • A freezing fog advisory for Wallowa County, Oregon, remains in effect until 9 a.m. Wednesday with visibility a mile or less.
  • Central Douglas County, Oregon, is under a dense fog advisory until 10 a.m. Wednesday with visibility down to one quarter mile and the potential for unhealthy air for sensitive groups.
  • The Inland Empire’s San Bernardino and Riverside County valleys are under a dense fog advisory until 9 a.m. Wednesday with visibility of a quarter mile or less.
  • Freezing fog can leave rime on surfaces and create nearly invisible black ice as supercooled droplets freeze on contact, heightening travel risks.
  • The National Weather Service urges drivers to slow down, use low-beam headlights, leave extra following distance, and if visibility drops near zero, pull over safely with hazard lights on and other lights off.