Overview
- This week U.S. forecasters raised the chance that El Niño will form by July to about 82 percent and that it will persist through December–February with roughly 96 percent odds, based on NOAA Climate Prediction Center updates.
- Multiple international model ensembles are projecting unusually large sea-surface warming in the equatorial Pacific, with some runs showing 2.5–3.0°C or more above average and NOAA placing about a one-in-three chance of reaching or exceeding 2°C.
- Scientists caution the event’s peak strength remains uncertain because it depends on ocean‑atmosphere coupling and the behavior of low‑level trade winds, processes that are hard to predict during spring.
- Agencies warn of near‑term human impacts: NOAA forecasts more frequent and deeper high‑tide flooding along U.S. coasts when El Niño combines with higher sea levels, Australia’s BOM expects a notably warm winter, and IMD research links El Niño years to stronger, prolonged heatwaves in India.
- Public and sectoral preparedness is being urged for water, agriculture, health and coastal management since a strong El Niño could push global temperatures higher, strain crops and water supplies, and alter storm and flood risks into 2027.