Welcome to California Cooperative Snow Surveys Website
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California Statewide Water Conditions *
(formerly known as California Water Supply Outlook)
- Disclaimer: The data in these reports are preliminary and may be subject to revision.
Overview of Hydrologic Conditions
- Executive Summary of Current Conditions
- Hydrologic Regional Summary (table & map) as of 1st of month (Feb - May)
Precipitation
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- Northern Sierra 8-Station Precipitation Index Chart (HTML)
- Northern Sierra 8-Station Tabulation for Current Water Year
- Northern Sierra 8-Station Tabulation for Previous Water Year
- Current Water Year Northern Sierra 8-Station Precipitation Index Chart (PDF)
- Previous Water Year Northern Sierra 8-Station Precipitation Index Chart (PDF)
- San Joaquin 5-Station Tabulation for Current Water Year
- San Joaquin 5-Station Tabulation for Previous Water Year
- Current Water Year San Joaquin 5-Station Precipitation Index Chart (PDF)
- Previous Water Year San Joaquin 5-Station Precipitation Index Chart (PDF)
- Regional Summary Tables as of end of month
Snowpack
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- Regional Snow Sensor Water Content Chart (HTML)
- Current Year Regional Snow Sensor Water Content Chart (PDF)
- Previous Year Regional Snow Sensor Water Content Chart (PDF)
- Snow Course Water Content by River Basin as of 1st of month (Jan - May)
- Historic April 1 Snowpack Percent of Normal
- FAQ (Snow)
Runoff Forecasts
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- Forecast of April to July Unimpaired Runoff as of 1st of month (Feb - May)
- Weekly Update (table) to Unimpaired Runoff Forecast (Feb- Jun)
- FAQ (Unimpaired Runoff)
- Forecast of Regional Water Supply Indices (Dec - May)
River Runoff
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- Unimpaired Runoff River Summary by Month
- Unimpaired Runoff Regional Seasonal Summary as of end of month
- FAQ (Unimpaired Runoff)
Reservoir Storage
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- Regional Multi-year Summary as of end of month
- Summary by River Basin & Hydrologic Region as of end of month
- Multi-year Storage Grouped By Project Area as of end of month



