Berryessa Snow Mountain National Monument

Heat Advisory issued October 8 at 9:57AM PDT until October 8 at 10:00PM PDT by NWS San Francisco CA

9:57 AM — 10:00 PM

* WHAT...Hot conditions with maximum temperatures in the mid-90s to near 105. * WHERE...The East Bay and San Francisco Bay Shoreline, North Bay Interior Mountains and Valleys, The Santa Clara Valley and Eastern Hills, The Santa Cruz Mountains, Interior Monterey County and the Santa Lucia Range, Most of San Benito County and the Cholame Hills in Southeast Monterey County, and Southern Salinas Valley/Arroyo Seco and Lake San Antonio. * WHEN...Until 10 PM PDT this evening. * IMPACTS...This level of heat affects anyone without effective cooling and/or adequate hydration. Impacts likely in some health systems, heat-sensitive industries and infrastructure.

Heat Advisory issued October 8 at 8:36AM PDT until October 8 at 11:00PM PDT by NWS Eureka CA

8:36 AM — 4:45 PM

* WHAT...High temperatures of 95 to 100 with overnight temperatures in the high 50s and 60s. Moderate to localized Major HeatRisk. * WHERE...Mendocino Interior, and Lake County. * WHEN...Until 11 PM PDT this evening. * IMPACTS...Hot temperatures may cause heat illnesses.

Heat Advisory issued October 7 at 8:51AM PDT until October 8 at 10:00PM PDT by NWS Sacramento CA

October 7th, 8:51 AM — 2:00 PM

* WHAT...High temperatures of 92 to 101 degrees expected and overnight low temperatures in the mid 60s to low 70s, with widespread Moderate HeatRisk and areas of Major HeatRisk. * WHERE...The Sacramento and northern San Joaquin Valleys, Delta and Carquinez Strait, and foothills. * WHEN...Until 10 PM PDT Thursday. * IMPACTS...Hot temperatures may cause heat illnesses, especially to anyone without effective cooling and/or adequate hydration. * ADDITIONAL DETAILS...Hottest days expected Today and Thursday. Temperatures begin a cooling trend on Friday, with Moderate HeatRisk in the foothill thermal belts and in Sacramento; Minor HeatRisk elsewhere.

Overview

Berryessa Snow Mountain National Monument encompasses 344,476 acres of some of northern California's most scenic and biologically diverse landscapes, spanning from rolling oak-studded hillsides to steep creek canyons with peaks reaching over 7,000 feet. Originally designated by President Obama in July 2015, the monument was expanded by 13,696 acres in May 2024 by President Biden to include Molok Luyuk (Condor Ridge), an 11-mile ridgeline. The monument is jointly managed by the BLM (147,262 acres) and U.S. Forest Service (197,214 acres). It offers diverse recreation including hiking, Cache Creek whitewater rafting, OHV use at Knoxville Recreation Area, primitive camping, hunting, and mountain biking. The area is known for its unique serpentine soils that support specially adapted plant communities. Three wilderness areas are within or adjacent to the monument: Cache Creek Wilderness (centered on a 17-mile stretch of Cache Creek), Cedar Roughs Wilderness (accessible only by boat, no developed facilities), and Yuki Wilderness (adjacent to the northern boundary). The monument is open year-round but may be subject to seasonal fire restrictions. Note that a current government shutdown may affect website updates and agency responsiveness. Access can be challenging in some areas due to surrounding private lands—consult current maps and field offices for route planning.

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