A super El Niño is brewing: What it could mean for upcoming winter season

El Niño is a natural climate pattern in which unusually warm surface water spreads eastward across the tropical Pacific. It changes atmospheric circulation and rainfall patterns far beyond the ocean. It is the warm phase of the El Niño–Southern Oscillation, or ENSO, which also includes La Niña and neutral phases.

Normally, trade winds push warm water westward toward Indonesia and Australia. When those winds weaken, warm water moves eastward and the Walker circulation shifts. This can alter rainfall, temperatures and snowfall in distant regions, including India. ENSO events typically recur every two to seven years.

“Super El Niño” is not an official scientific category. It is an informal term for an exceptionally strong event. The World Meteorological Organization forecast a Niño-3.4 anomaly of about +3.7°C during October–December 2026, potentially exceeding the 2015–16 peak. Forecasts remain uncertain, and strong El Niño does not guarantee specific damage.

The expected event could exceed the strongest recent benchmark cited in the article. The World Meteorological Organization forecast a Niño-3.4 sea-surface temperature anomaly of approximately +3.7°C for October–December 2026. The 2015–16 event reached a peak anomaly of +2.6°C. That would make the projected anomaly about 1.1°C higher.

Niño-3.4 measures sea-surface temperature departures in a central Pacific region. A larger positive anomaly generally signals a stronger El Niño, because more unusually warm water can reshape tropical atmospheric circulation. That circulation influences rainfall and temperatures worldwide.

The projection is not a confirmed outcome. NOAA forecast an 83 per cent or greater chance that strong-to-very-strong conditions would persist through January–March 2027. The article also notes that even an exceptionally strong El Niño cannot guarantee a failed Indian monsoon or a particular level of damage.

A strengthening El Niño can shift global atmospheric circulation, so India may experience unusual winter temperatures and rainfall. The article describes a risk of exceptionally warm conditions, but it does not present warmth as certain everywhere. Some belts may experience opposite effects. Winter outcomes depend on El Niño interacting with other weather systems.

Northern India is strongly affected by western disturbances. These systems bring rain to the plains and snowfall to the Himalayas. If El Niño influences winter circulation, rainfall and snowfall patterns could change. Soumya Dutta also warned that snow might fall, melt into rain, and flow away instead of building up layer by layer as stored water.

That possible “snow drought” could reduce later water availability in Himalayan river systems. It could affect agriculture, drinking water and industries that depend on those rivers. The article says El Niño may peak in late November or early December, making the following winter and early 2027 especially important.

The deficient monsoon creates a weaker starting point for winter and the next agricultural cycle. India received 759.4 millimetres of rain from June 1 to September 30, 2026, compared with an 868.6-millimetre long-period average. The 12.6 per cent shortfall, roughly 13 per cent, was the fourth-lowest southwest monsoon total since 2001.

Less rain can mean reduced water availability, drier soil and greater pressure on agriculture. The article links these concerns to rabi crops, drinking water, electricity demand and public health. A strong El Niño could add unusual warmth or disrupt winter rainfall, while reduced Himalayan snow accumulation could weaken future water storage.

The combined risk extends beyond one season. Water shortages could affect farming and industries using Himalayan rivers. A very warm summer in 2027 could increase electricity demand and health pressures. These are risks, not guaranteed outcomes, because El Niño’s effects depend on other weather systems and regional conditions.

El Niño changes ocean temperatures and atmospheric circulation, but India’s weather is produced by several interacting systems. Its influence can raise the risk of certain rainfall or temperature patterns without determining them exactly. That is why a strong El Niño is a warning signal, not a precise forecast of India’s winter or monsoon.

For northern India, western disturbances are especially important. They bring rain to the plains and snowfall to the Himalayas, and their frequency and intensity help decide whether winter is wet, dry, warm or cold. Local conditions and the timing of different systems can change the final result.

The article explicitly cautions that forecasts are not confirmed outcomes. Even an exceptionally strong El Niño does not guarantee a failed Indian monsoon or a particular level of damage. The coming season will depend on how El Niño interacts with other weather systems, especially through early 2027.

El Niño is only one part of India’s weather system. Western disturbances affect northern India by bringing rain to the plains and snow to the Himalayas. Their frequency and intensity can change whether winter precipitation arrives, where it falls, and how much snow accumulates for later water storage.

The Indian Ocean Dipole, or IOD, is another ocean–atmosphere pattern that can influence Indian rainfall. In broad terms, its phases can reinforce or counteract rainfall tendencies associated with El Niño. This means a strong El Niño does not operate in isolation. However, the provided article does not describe the IOD or state how it is behaving in 2026.

The article therefore focuses on uncertainty. It says India’s winter will depend on interactions among El Niño, western disturbances and other weather systems. Snowfall, rainfall and temperatures could develop differently across regions, so the strength of El Niño alone cannot determine the final outcome.

Under normal conditions, trade winds push warm surface water westward across the tropical Pacific toward Indonesia and Australia. Cooler, nutrient-rich water rises near South America. This east–west temperature contrast helps drive the Walker circulation, a pattern of rising and sinking air that shapes tropical rainfall.

During El Niño, the trade winds weaken. Warm surface water then spreads eastward across the Pacific, reducing the usual temperature contrast. The Walker circulation shifts because the main zones of rising and sinking air move. As a result, rainfall patterns change over the Pacific and can be disrupted in distant regions, including India.

This ocean–atmosphere chain explains why a Pacific event can affect farmers and power-grid operators thousands of kilometres away. The current event is forecast to intensify toward late 2026. Its eventual effects on India will still depend on interactions with other weather systems, so the mechanism creates risk rather than certainty.