California Avalanche Forecast Center

California Avalanche Forecast Center
Name	California Avalanche Forecast Center
Type	Public safety agency
Founded	2004
Location	South Lake Tahoe, California
Area served	Sierra Nevada, Cascade Range (North America), Klamath Mountains
Parent organization	California Department of Conservation

California Avalanche Forecast Center

The California Avalanche Forecast Center (CAFC) is a specialized public-safety forecasting entity that issues seasonal and day-to-day avalanche information for high-risk snowpack regions in California. It provides situational awareness, forecasts, and educational resources to a wide array of users including backcountry recreationists, search and rescue teams, state agencies, and transportation authorities. The center operates within a network of regional and national snow and weather services to inform decision-making for California Department of Transportation, United States Forest Service, and emergency management partners.

Overview

The CAFC issues avalanche forecasts, advisories, observations, and danger ratings for mountainous areas in the Sierra Nevada, Cascade Range (North America), and adjoining ranges such as the Klamath Mountains. It synthesizes inputs from meteorological sources like the National Weather Service, snowpack monitoring programs such as the Snow Survey and Water Supply Forecasting (SNOTEL), and field observations from locally based professional guides and volunteer observers associated with organizations like the American Avalanche Association and the Backcountry Access. The center’s audience includes recreational users linked to Sierra Club, alpine guides affiliated with American Mountain Guides Association, transportation agencies such as California Department of Transportation, and search-and-rescue units like Mountain Rescue Association teams.

History

The CAFC traces its institutional origins to collaborative efforts in the late 20th and early 21st centuries to centralize avalanche forecasting across California. Early regional forecasting activities were influenced by pioneers in snow science from institutions such as the University of California, Berkeley and the Scripps Institution of Oceanography, while operational models and observer networks were informed by practices from the Colorado Avalanche Information Center and the Utah Avalanche Center. Formalization accelerated after high-profile avalanche incidents that involved users connected to Sierra Club outings and professional guiding services, prompting coordination with state entities including the California Department of Conservation and federal partners such as the United States Geological Survey. Over time, the center expanded its observational network, incorporated automated weather stations modeled on SNOTEL sites, and integrated remote-sensing collaborations with research programs at NASA and the National Snow and Ice Data Center.

Services and Operations

CAFC issues daily avalanche forecasts, danger-scale ratings, avalanche problem descriptions, and human-triggering risk guidance tailored to zones used by groups such as Backcountry Hunters & Anglers and commercial operators affiliated with the Professional Ski Instructors of America. Operational services include data collection from snowpits, automated weather stations, and citizen-science reports submitted through platforms linked to the American Avalanche Association. The center supports incident response by supplying scenario briefings to California Governor's Office of Emergency Services and coordinates closely with United States Forest Service district offices for trail and road management. In addition to forecast bulletins, CAFC maintains archival observation databases used by researchers at institutions like the University of California, Davis and California State University, Sacramento.

Forecasting Methodology

Forecasting at CAFC combines meteorological analysis, snowpack stratigraphy, and field-based stability tests. Meteorological inputs rely on forecast models from the National Weather Service and observational networks including SNOTEL and regional Remote Automatic Weather Stations. Snowpack assessment uses stratigraphic profiling techniques developed in cooperation with the American Avalanche Association and research groups at the University of Colorado Boulder and Colorado State University. Field tests such as compression tests and extended column tests follow protocols recognized by the Avalanche Research Community and are complemented by automated sensor data and incident reports aggregated from partners like the Mountain Rescue Association and commercial guiding services. Forecasters translate these datasets into danger ratings aligned with the international five-level avalanche danger scale used by centers including the Canadian Avalanche Association and the Alaska Avalanche Information Center.

Education and Outreach

CAFC runs public education programs aimed at users ranging from weekend backcountry skiers affiliated with Sierra Club chapters to professional guides in the American Mountain Guides Association. Offerings include avalanche awareness courses coordinated with American Avalanche Association instructors, field-based companion rescue clinics, and digital resources promoted through regional hubs such as Tahoe Regional Planning Agency outreach events. The center partners with universities like University of California, Berkeley for guest lectures and collaborates with community groups including Friends of the Earth and outdoor retailers that host clinics. CAFC also contributes to media briefings during high-risk weather events alongside the National Weather Service and state emergency offices.

Partnerships and Collaborations

The center maintains partnerships with federal partners including the United States Forest Service, National Weather Service, and the United States Geological Survey; academic collaborators at the University of California system and Stanford University; and nonprofit organizations such as the American Avalanche Association, Mountain Rescue Association, and Sierra Club. It engages with commercial stakeholders including guiding services registered with the American Mountain Guides Association and transportation agencies like California Department of Transportation for avalanche control operations. Research collaborations have included projects with NASA and the National Snow and Ice Data Center to refine remote-sensing applications for snow stability assessment.

Notable Events and Impact

CAFC’s forecasts have been central during major storm seasons that affected travel corridors such as the Donner Pass and Yosemite National Park approaches, informing avalanche mitigation actions by California Department of Transportation and United States Forest Service avalanche control teams. The center played a coordinating role following high-profile avalanche incidents that prompted multi-agency search efforts involving the Mountain Rescue Association and county sheriff’s offices, and its data archives have been cited in research published by the American Avalanche Association and university snow-science programs. CAFC-driven outreach and training have contributed to measurable increases in personal-rescue preparedness among backcountry users associated with regional Sierra Club groups and commercial guide services.

Category:Organizations based in California Category:Avalanche safety