Supercharged El Niño is likely coming

A powerful El Niño is taking shape, which means South Louisiana may get a strange weather bargain: fewer hurricanes, but more rain and a few bigger risks hiding in the fine print.

What's happening: El Niño is the periodic warming of the tropical Pacific Ocean. That warmth shifts weather patterns around the world, including here.

• NOAA says we are already in an El Niño, and there is a 63% chance it will strengthen into a rare "super" El Niño this winter. That has happened only a handful of times since 1950, including 1982–83, 1997–98, 2015–16 and 2023–24.

What it means for Louisiana:

• El Niño usually cuts down on Atlantic hurricanes by creating wind shear that makes it harder for storms to form and survive. That's comforting, but only up to a point. A storm that does make it into the Gulf will find very warm water waiting. And warm Gulf water turns a bad storm into a rapidly intensifying one.
• El Niño also tends to make Gulf Coast winters wetter. For South Louisiana, that means more chances for heavy rain, flooding and severe weather through fall and winter.
• There's also a longer-term concern. After the 2015–16 super El Niño, researchers found the Gulf settled into a warmer pattern that may have helped fuel stronger hurricanes in the years that followed. Another strong El Niño could help reset the Gulf's thermostat again.

The bottom line: El Niño should reduce the number of Atlantic storms this season, so the big-box run for pallets of water may be less likely. But Louisiana does not get a free pass. The tradeoff could be a wetter fall and winter, a small but real drought risk later, and the possibility of a Gulf that stays warmer for years.

The headline number looks reassuring. The fine print is where Louisiana lives.