El Niño news
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- 2026 El Niño closes in on the 1997 record
RONI reaches 2.0 °C; traditional indices already top 1997 and 2015 for this time of year.
- NOAA keeps odds above 83% for a strong to very strong El Niño into early 2027
Climate Diagnostics Bulletin from the Climate Prediction Center.
- How the RONI index measures El Niño strength
A look at the relative index NOAA now uses as its main gauge.
- NOAA declares El Niño, already seeing a 63% chance of a very strong event
The official advisory came in June, with strengthening expected through the Northern Hemisphere winter.