A dense fog advisory is in effect for the Valley until 10 a.m. on Saturday.Fog is very dense in spots this morning, reducing visibility to less than a quarter of a mile. Fog will likely linger until 11 a.m. Once the fog clears, skies will be partly sunny for the rest of the day with highs in the upper 50s and low 60s, slightly cooler than yesterday. Sunday will be a repeat of today. Air quality in the Valley is “unhealthy for sensitive groups.” High pressure has been sitting overhead for days, creating stagnant air. Those with lung ailments like COPD and asthma, the young, and the elderly should avoid outdoor activities. The Foothills and Sierra will start off sunny with a few clouds pushing in for the late morning and afternoon. Dry conditions are forecast for the rest of the week with slightly above normal temperatures.

SACRAMENTO, Calif. —

A dense fog advisory is in effect for the Valley until 10 a.m. on Saturday.

Fog is very dense in spots this morning, reducing visibility to less than a quarter of a mile. Fog will likely linger until 11 a.m. Once the fog clears, skies will be partly sunny for the rest of the day with highs in the upper 50s and low 60s, slightly cooler than yesterday. Sunday will be a repeat of today.

Air quality in the Valley is “unhealthy for sensitive groups.” High pressure has been sitting overhead for days, creating stagnant air. Those with lung ailments like COPD and asthma, the young, and the elderly should avoid outdoor activities.

The Foothills and Sierra will start off sunny with a few clouds pushing in for the late morning and afternoon.

Dry conditions are forecast for the rest of the week with slightly above normal temperatures.