El Niño tracker
The latest official ENSO status and forecast—translated into a clear briefing, with an optional look at implications for AI data-center cooling.
Current outlook
El Niño
El Niño continues to strengthen, with a strong-to-very strong El Niño likely through January-March 2027 (remaining greater than an 83% chance).
Forecast chance
83%
Outlook period
January-March 2027 (remaining greater than an 83% chance)
NOAA issued
8 October 2026
Next discussion
12 November 2026
Last checked
Oct 12, 2026, 11:34 PM UTC
Forecast windows
What NOAA expects next
83%
Primary outlook
El Niño
January-March 2027 (remaining greater than an 83% chance)
How to read this
Probability is not impact
ENSO describes a coupled ocean–atmosphere pattern in the tropical Pacific. A high probability means scientists are confident about the ENSO state; it does not guarantee drought, flooding, or heat in any particular place.
For local seasonal risk, follow the linked NOAA outlooks. The data-center scenarios below are educational models, not weather forecasts.
Optional exploration
Explore possible data-center impacts
Test illustrative water-efficiency scenarios or step into a fictional operations crisis. These tools explain tradeoffs; they do not extend NOAA's forecast.
Simulate Weather Severity
Slide the controller to observe how global temperature anomalies affect cooling water extraction in key computing basins.
Current briefing reference
NOAA reports 83% chance for El Niño in January-March 2027 (remaining greater than an 83% chance). The control remains an illustrative scenario, not a NOAA forecast model.
Regional Water Intensity Spikes
WUE (Water Usage Effectiveness) measures Liters of cooling water consumed per kWh of compute energy.
Arizona (US West)
Watershed: Colorado River BasinVirginia (US East)
Watershed: Potomac River BasinIowa (US Central)
Watershed: Missouri River BasinSweden (EU North)
Watershed: Northern Lakes (Air Cooled)Continue exploring
Measure the footprint of your own AI use
Estimate electricity, water and carbon impacts by model and usage pattern.
ENSO status and probability are sourced from the NOAA Climate Prediction Center. Illustrative water-efficiency scenarios use generalized parameters informed by WRI Aqueduct concepts and should not be used for operational planning.