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Northern California Hits Triple-Digit Heat While Bay Area Stays Cool

A strong high-pressure ridge is driving valley highs above 100°F with similar conditions expected into early next week

Overview

  • A high-pressure ridge built in Thursday, pushing Sacramento and Central Valley temperatures to a season-high 100–105°F.
  • The National Weather Service has issued a heat advisory from 11 a.m. Friday through 11 p.m. Sunday for Oroville, Red Bluff, Yuba City and Redding due to elevated heat-related health risks.
  • Smoke from wildfires near Mount Shasta is drifting into the Sacramento Valley, producing haze and unhealthy air quality for sensitive groups.
  • Persistent onshore winds and cooler-than-normal ocean temperatures have reinforced the marine layer, keeping coastal Bay Area highs largely in the 60s and 70s.
  • Forecasters predict recurring triple-digit days through early next week before a gradual cooldown and marine-layer rebound around midweek.