Observed arrival · 2026-10-21
ENSOLens tracks the Pacific signal—and what it may mean
An independent ENSO dashboard brings together NOAA/CPC observations, seasonal probabilities, and regional context for El Niño and La Niña.
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- For
- Readers tracking ENSO and U.S. seasonal impacts
- Worth noticing
- It explains why weekly Niño 3.4 and seasonal RONI readings differ: they use different baselines and observation windows.
Field notes
The dashboard labels its material as NOAA/CPC-sourced and displays a weekly Niño 3.4 reading alongside a seasonal RONI series. It explains that the measures use different baselines and observation windows. Its table is tied to CPC issue 2026-10 and compares September and October issues for the same DJF season; the page also notes that the original NOAA figure is unavailable in its display.
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