Plan with Confidence—Months in Advance
The California Annual Precipitation (CAP) Forecast delivers a precise, long-term outlook on rainfall and snow water equivalent for the upcoming water year, so you can plan with confidence.
Make Confident Water Decisions with the CAP Report
With nine years of proven accuracy, CAP delivers stable, long-term precipitation forecasts that help you plan ahead, optimize resources, and reduce risk.
Fixed & Reliable Forecasting
Unlike fluctuating seasonal models, CAP provides a stable prediction issued in November for the upcoming water year.
Actionable & Data-Driven
Instead of vague probability-based estimates, CAP delivers a clear precipitation range that’s easy to plan around.
Progress Reports & Insights
Stay informed with monthly reports and weather-driven event analyses.
This tool turned our efforts from a shot in the dark to planning based on actionable information. I can’t recommend it highly enough.
Tim Johnson
President & CEO, California Rice Commission
Statewide clarity, with focus where it counts.
The CAP Report covers the entire state of California—delivering a definitive forecast for both statewide precipitation and the critical Core Water Supply region, which includes the Sacramento and San Joaquin River basins and other key watersheds that feed the state’s major reservoirs and supply systems. You'll also receive a downscaled forecast tailored to your specific region of interest, so you're not left interpreting broad trends without local context.
A one-time forecast—with all-year guidance.
CAP is more than a single report. While your initial forecast arrives in early November and doesn’t change throughout the season, you’ll also receive progress reports designed to keep you informed, responsive, and in control all year long:
Monthly Reports
Track statewide and regional precipitation, timing insights, and storm analysis.
Ad Hoc Weather Event Bulletins
Post-storm event analysis to help you stay informed.
End-of-Year Summary
A comprehensive year-end summary evaluating forecast performance and highlighting trends for future planning.
Your forecasts and insights, always within reach.
Subscribers get 24/7 access to the secure Weather Tools online portal, where CAP and CRAFT forecasts live side by side. Review historical data, current performance, and insights whenever you need them. No PDFs lost in inboxes—just clear, convenient access to the data that drives your decisions.
Accurate forecasts
NINE years and counting
CAP forecasts have successfully verified EVERY year – 9 years in a row. No other California precipitation forecast has come close to doing the same.
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Early Insight for the People Who Keep California Running.
An accurate precipitation forecast—delivered at the start of the water year—gives key industries the clarity they need to plan, allocate, and protect their resources long before the season unfolds.
Agriculture
Plan irrigation strategies and planting decisions with a better sense of how much water will be available for the season.
Water Managers
Make early decisions about reservoir operations, water allocations, and drought response—backed by reliable data, not changing probabilities.
Utilities
Forecast hydroelectric output and water supply for urban systems well in advance, helping manage infrastructure and demand with confidence.
Banks/Insurance
Assess agricultural and infrastructure risk proactively with long-lead insight into seasonal water supply and precipitation trends.
Get the weather intelligence your operation depends on.
Smarter planning for the water year starts with CAP. Schedule a call with Rob to get started.