Sacramento, CA – A Dense Fog Advisory is in effect until 11 AM today for the Delta, Central and Southern Sacramento Valley, and Northern San Joaquin Valley. Thick fog is reducing visibility to a quarter mile or less in cities like Stockton, Modesto, Sacramento, and Vacaville. Travelers are urged to use caution on the roads. The fog is expected to persist into the early afternoon, with conditions improving later in the day. Dry weather will dominate through Friday, with warmer temperatures and more foggy mornings expected. By the weekend, unsettled weather and potential rain could return. Stay tuned for updates.