An extensive heat advisory across Northern California will officially expire at 10 p.m. local time on Sunday, according to the National Weather Service in Sacramento and San Francisco. Forecasters report that while extreme heat warnings are winding down, residents will still experience moderate heat risks as temperatures begin a gradual cooling trend into the upcoming week.
Northern California Counties Affected by Expiring Heat Advisories
The National Weather Service issued the initial weekend advisories across a vast stretch of the region, encompassing mountain ranges, foothills, and valley floors. According to the San Francisco office of the National Weather Service, the threat has ended for the Sonoma Coastal Range, North Bay Interior Mountains, East Bay Interior Valleys, Santa Cruz Mountains, and the Santa Clara Valley, including San Jose. Additional areas included the Eastern Santa Clara Hills, East Bay Hills, Southern Salinas Valley, Arroyo Seco, Lake San Antonio, the Santa Lucia Mountains, Los Padres National Forest, and Monterey County.
Meanwhile, the Sacramento office tracked the advisory across dozens of interior and mountain zones. Major transportation corridors like Interstate 5, Interstate 80, and Highway 50 also fell within the advisory footprint.
Temperature Forecast and Upcoming Cooling Trends
Temperatures are projected to drop by a few degrees on Monday, though widespread moderate HeatRisk will persist across the region. According to the National Weather Service in Sacramento, more noticeable cooling will finally begin on Tuesday and continue through the remainder of the week, offering relief from the prolonged high temperatures that prompted the weekend alerts.
Keep reading