- What Defines a “Super” El Niño: A “super” El Niño occurs when sea surface temperatures in the central and eastern equatorial Pacific climb by at least 2°C above average.
- Timeline: NOAA models indicate the climate pattern will intensify through the fall and winter, persisting until early spring 2027.
- Increased Rain & Flooding Risks:
- California: The European Centre for Medium-Range Weather Forecasts gives coastal California a 70%–100% chance of above-average winter precipitation.
- Gulf & East Coasts: Above-average rainfall is also projected along the Gulf Coast and stretching up through the Mid-Atlantic region.
Expert Insights:
Climate scientist Daniel Swain (UCLA) notes that while El Niño doesn’t guarantee a specific weather outcome, a strong event significantly shifts the odds toward a wet winter and higher risks of coastal flooding, especially during king tides. Oceanographer Mark Merrifield (Scripps) adds that reduced beach coastlines will leave cliffs and coastal homes more vulnerable to severe storm waves.
Historical Context
California has previously suffered major impacts from super El Niño events:
- 1982–1983: Destroyed 33 oceanfront homes and damaged thousands of residences.
- 1997–1998: Led to massive statewide flooding and 17 storm-related fatalities.
- 2015–2016: Caused record coastal erosion across California beaches.
