Track California Snow Conditions

The California Department of Water Resources (DWR) California Cooperative Snow Surveys (CCSS) program supports DWR’s water supply forecasting and flood management missions:

  • One of DWR’s longest standing programs, a model of cooperation and collaboration
  • Facilitates the cooperative sharing of data among California water management agencies
  • Issues regular water supply forecasts each winter and spring
  • Facilitates technical improvements in forecasting tools and technology
  • Serves as a clearinghouse for dealing with challenges and taking advantage of opportunities for improvement
Snow Surveying in El Dorado County Circa 1958
#

estimation of snow water volume will continue in water year 2025

~30%
of California's freshwater supplied by snowpack
96
years in operation
50+
active cooperating agencies

Snowpack as of 4/4/2025

Statewide Northern Region Central Region Southern Region
Percent of normal to date 101.0% 122.0% 97.0% 86.0%
Percent of April 1st average 100.0% 120.0% 96.0% 84.0%
OctNovDecJanFebMarAprMayJunJulAugSep05101520253035
AveragePrevious Water YearCurrent Water YearStatewide Snowpack as of 4/4/2025Snow Water Equivalent (Inch)
OctNovDecJanFebMarAprMayJunJulAugSep05101520253035
AveragePrevious Water YearCurrent Water YearNorthern Region Snowpack as of 4/4/2025Snow Water Equivalent (Inch)
OctNovDecJanFebMarAprMayJunJulAugSep05101520253035
AveragePrevious Water YearCurrent Water YearCentral Region Snowpack as of 4/4/2025Snow Water Equivalent (Inch)
OctNovDecJanFebMarAprMayJunJulAugSep05101520253035
AveragePrevious Water YearCurrent Water YearSouthern Region Snowpack as of 4/4/2025Snow Water Equivalent (Inch)