NASA data suggests current Super El Niño rivals historic 1997 storm

This year's developing "Super El Niño" might just become one of the strongest events ever recorded. Scientists are already lining it up against two historic benchmarks: the massive 1997–98 outbreak and the powerful 2015–16 cycle. NASA satellite data suggests the current pattern looks a lot like the 1997–98 monster right now.

El Niño is simply the Pacific Ocean's "warm phase." Every few years, unusually hot water builds up across the equatorial Pacific. This heat weakens trade winds and pushes tropical rainfall eastward. That ocean-atmosphere shift can nudge the jet stream in ways that bring wetter conditions to the southern United States while sending warmer, drier weather toward parts of northern America and Canada during winter.

But each El Niño develops differently. They vary wildly in strength, duration, and impacts. Right now, long-range forecasts suggest the 2026–27 event could rank among the strongest in recent history. The satellite image captured on Oct. 12 shows the classic fingerprint of a powerful system. A broad red band stretches across the central and eastern equatorial Pacific, representing higher-than-normal sea levels. This sign means warm water has expanded and surged eastward toward South America. Blue shades mark lower-than-normal sea levels, while white indicates near-average conditions.

Could history repeat itself? The 1997–98 El Niño sent a huge pool of warm water surging east across the Pacific, reaching all the way to South America. Its influence was felt worldwide. Fires roared through Indonesia and the Amazon. Drought-driven crop failures hit Southern Africa hard. Heavy rain and coastal flooding battered Southern California and the southern U.S.

Then there was 2015–16. Another major heavyweight featured exceptionally warm, elevated water across the Pacific. Its impacts looked different though. Rainfall focused more heavily over Central America and the southeastern United States. Mexico experienced significant flooding. Unlike 1997–98, the warm water did not extend as far south to South America.

NASA says the current El Niño more closely resembles the 1997–98 event so far. But scientists caution that its eventual impacts remain uncertain. The ongoing event could rank with these heavyweights, or it might even surpass them as a benchmark. If this winter unleashes more storms, it will drive an active pattern into the south. There is real urgency here because the window to understand what lies ahead is closing fast.