Super El Niño May Increase Rain and Flood Risk in North Texas

Climate models and meteorological forecasts indicate an increased risk of a rare super El Niño developing in the fall of 2026, a phenomenon that could significantly alter weather patterns across the globe and specifically impact Texas.

The National Oceanic and Atmospheric Administration’s (NOAA) Climate Prediction Center has issued an El Niño watch, noting that conditions are becoming favorable for the pattern to develop this year. Current outlooks suggest a 61% to 62% chance that El Niño will emerge and persist through the end of 2026.

Understanding the Transition from La Niña

The shift toward El Niño follows a period of La Niña conditions that had been present since the summer of 2024. While there was a brief return to neutral conditions in 2025, La Niña reemerged before officially fading. NOAA’s Climate Prediction Center issued its final La Niña advisory in March 2026.

El Niño and La Niña are opposite phases of the El Niño–Southern Oscillation (ENSO), a climate pattern monitored in the equatorial Pacific Ocean. These phases are determined by changes in wind patterns and sea surface temperatures (SSTs) along the west coast of South America.

While the tropical eastern Pacific is expected to remain neutral through much of 2026, forecasters have identified a large pool of warm water beneath the surface of the tropical Pacific. In previous events, this subsurface warmth has risen and spread eastward, serving as a primary catalyst for the establishment of El Niño.

Potential Impacts on Texas Weather

A super El Niño is characterized by unusually intense ocean warming, which can shift the jet stream southward. For the southern United States, this typically steers more storms across the region, increasing the likelihood of heavy rain, and flooding.

In North Texas, these effects may become apparent during the summer and fall seasons. The potential for increased rainfall brings a higher risk of severe weather and flooding events as the pattern strengthens.

The influence of this climate pattern is also expected to affect the 2026 Atlantic hurricane season, which begins on June 1. El Niño typically increases upper-level winds across the Atlantic, creating wind shear. This atmospheric condition can disrupt the development of storms, making it less likely for hurricanes to form or gain strength.

Mechanics of the Super El Niño

The development of El Niño is driven by the weakening of trade winds. Under normal conditions, these winds pool warm water in the western Pacific. When they weaken, that warm water expands and shifts eastward toward the Americas.

This process disrupts the typical cycle of upwelling and downwelling along the South American coast, altering sea surface temperatures and subsequently disrupting global weather patterns.

While a standard El Niño is a recurring climate event, a super El Niño is rare due to its extreme intensity. The potential for such a strong event to emerge by the fall of 2026 has led meteorologists to increase monitoring of Pacific temperature anomalies.