Overview
- Dense Fog Advisories continue in the Central Valley and Delta, causing sudden drops in visibility through late morning and slowing commutes.
- Air quality remains degraded in the Valley, with moderate to unhealthy readings under stagnant low clouds before fog typically lifts by midday.
- Light, hit‑or‑miss rain is expected primarily from the Santa Lucia Range into Southern California through Friday, with most spots under 0.25 inch, per the National Weather Service.
- Mountain snow stays limited to higher elevations with minimal accumulation, and Tahoe is unlikely to see meaningful snow from this system.
- Northern California stays largely dry over the next week as high pressure rebuilds this weekend, with forecast guidance hinting at better storm chances late January into early February.