A Year of Water Highs and Lows: California’s 2024 Reservoir Levels and Anticipated La Niña Effects

In 2024, California’s weather has presented us with a mixed bag of challenges and triumphs. Winter temperatures and precipitation were slightly above average, but saw mild interruptions in transplanting, while July brought about extreme temperatures—over 100 degrees for more than 50 days in the San Joaquin and Sacramento Valleys. On a positive note, August saw a further increase in the California State Water Project (SWP) water supply allocation, now up to 40%.

Jones (CVP) Pumping Station

California’s major reservoirs (See Figure 1) have seen a significant boost. Currently, their levels range from 95% to 139% of the historical average, which is a testament to the effective management and resilience of our water systems. The State and Federal pumping from the Banks (SWP) and Jones (CVP) pumping stations have been operating near their full capacity, contributing to a restoration of the San Luis Reservoir to 120% of historical values. With a current combined storage of 941,596 Acre Feet, and the Central Valley Project Share at 416,200 Acre Feet, the San Luis Reservoir is well-positioned to support critical agricultural needs, including those of Westland’s Water District, which serves Fresno County—the leading processing tomato growing region in the state.

Looking ahead, however, there are concerns to be mindful of. Forecasts indicate a 66% chance of La Niña conditions developing from September through November, potentially extending into the winter of 2024/2025. La Niña typically brings drier weather patterns to California, which could impact water availability and agricultural productivity. Additionally, California’s Sustainable Groundwater Management Act (SGMA) restrictions are likely to influence how growers manage their resources and adapt to changing conditions.

Despite these challenges, the tenacity of California growers remains unwavering. Our community has consistently demonstrated its ability to overcome adversity through innovative solutions and determined efforts.

Morning Star will continue to develop our understanding of the future water availability in California and evolve our tomato acquisition strategy to better ensure a sustainable future.

Figure 1 – Source: California Department of Water Resources

PDF Link: CA Res Chart_Sept 8

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