April 30, 2026
Core Supply Dashboard
WY 2025–26 Precipitation Forecast: Near Normal Overall, Slightly Wetter in the North
Following an “average” year in 2024–25, precipitation for water year 2025–26 is projected to be near normal across California. Forecast guidance suggests a modest north–south gradient, with conditions trending near to slightly above average in the northern portion of the Core Supply region and near to slightly-below average in the south.
See the Regional Sections for a more detailed breakdown by region.
The dashboard below shows the Core Supply status (Regions 2, 4, and 6, shaded orange) with observed data through April 27, 2026.
Core Supply:
CAP Forecast WY 2024-25
Core Supply:
Year-over-Year Comparison
Highlights
- April made up for what March lacked. According to NWS totals, the Core Supply received an impressive 4.92 inches of accumulation, increasing water year progress by approximately 15 percentage points.
- With the Core Supply currently at 91% of average based on NWS data and 95.6% using GG Weather, conditions sit just below or at the lower bound of the ALICE forecast range.
- NWS precipitation totals reflect broader water supply conditions, while GG Weather values highlight conditions in valley and coastal areas and in situ recharge. Visit the Regional Pages to explore conditions most relevant to your operations.
- With April’s precipitation boost, the accumulation curves are tracking closely with those of analog years 2018-19 and 2024-25. See the Insights Section for accompanying graphics and a comprehensive discussion of precipitation through the end of April.
- Please note, observed reservoir inflows through April 27, 2026, are available in the CRAFT section of the portal.
