Explore how El Niño and La Niña phases affect corn and soybean yields across the US Corn Belt (1996–2025).
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Interactive Map
Choropleth of 919 county areas across 10 states. Hover for details, click to select a county.
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Crop & Phase Filters
Switch between corn and soybean. View average yield or impact by ENSO phase (El Niño, La Niña, Neutral).
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Phase Impact Cards
See yield deviation (% and bu/ac) for each phase vs the 30-year mean, for your selected county or state.
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Year-by-Year Table
Full historical yield series with ONI values and phase classification for the selected county.
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Global Map
Choose local outlines or online topographic, satellite, and dark maps. County yields cover 10 Corn Belt states.
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Methodology
Explore county yield averages by ENSO phase using USDA NASS yields and NOAA ONI classifications.