Foggy morning prompts advisory in Sacramento Valley

Fog formed in the Sacramento Valley on Friday morning, but dry, clear conditions were expected for most of the day and weekend.

A dense fog advisory was issued until 10 a.m. Friday because visibilities were below a quarter of a mile in many areas around Sacramento and portions of the Sierra foothills. A dense fog advisory means visibilities will frequently be less than a quarter of a mile.

Areas of fog were most dense in the central and southern Sacramento Valley and foothills, according to the National Weather Service. Visibilities at 4 a.m.:

Marysville: three-quarters of a mile

Beale Air Force Base: a quarter of a mile

Sacramento International Airport: one-eighth of a mile

Sacramento’s Executive Airport: a quarter of a mile

Mather Field: a quarter of a mile

Grass Valley: one-eight of a mile

Lincoln: a quarter of a mile

The detailed, seven-day forecast from the NWS for the Sacramento region:

Friday: Areas of fog before10 a.m. Otherwise, mostly sunny, with a high near 67. Light and variable wind.

Tonight: Partly cloudy, with a low around 48. Light south southeast wind.

Saturday: Partly sunny, with a high near 67. Calm wind.

Saturday night: Partly cloudy, with a low around 47. Light west southwest wind.

Sunday: Mostly sunny, with a high near 68. South wind around 14 mph becoming north northwest in the morning. Winds could gust as high as 21 mph.

Sunday night: Partly cloudy, with a low around 43.

Monday: Partly sunny, with a high near 67.

Monday night: Mostly cloudy, with a low around 46.

Tuesday: Mostly cloudy, with a high near 67.

Tuesday night: A chance of rain. Mostly cloudy, with a low around 51.

Wednesday: A chance of rain. Mostly cloudy, with a high near 67.

Wednesday night: Mostly cloudy, with a low around 50.

Thursday: Partly sunny, with a high near 67.

This story was originally published November 14, 2014 at 6:44 AM with the headline "Foggy morning prompts advisory in Sacramento Valley."