Experts clarify how intense El Niño phenomenon will lead to the end of hurricane season

As the El Niño phenomenon intensifies in 2026, meteorologists anticipate a significant shift in the Atlantic hurricane season, predicting a swifter-than-usual conclusion. Current projections suggest that the strengthening of this climate event will curb cyclonic activity, leading to a more rapid decrease in storms during October and early November.

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If the current projections are met, the strengthening of this climatic event will favor a decrease in cyclonic activity towards the end of the season, with a faster decline than usual during October and the first days of November.

According to an analysis by Local10, meteorological models overwhelmingly indicate that the developing El Niño could become one of the most powerful on record. While officially declared only weeks ago by the National Oceanic and Atmospheric Administration (NOAA), the warming of equatorial Pacific waters is progressing at an unprecedented pace. El Niño events are characterized by abnormal warming of surface waters in the eastern Pacific, typically peaking between November and January, but this year's development is notably accelerated.

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The meteorological models agree almost unanimously that the El Niño episode developing this year could become one of the most intense recorded, and even aspire to be the strongest on record.

A key consequence of a strong El Niño is the reduction of hurricane activity in the Atlantic. This occurs as El Niño alters wind patterns, increasing vertical wind shear – a critical factor that impedes the development and intensification of tropical cyclones. This effect not only potentially reduces the number of storms but also compresses the season's activity into a shorter timeframe.

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One of the best-known effects of a strong El Niño is the reduction of hurricane activity in the Atlantic.

The analysis further explains that during strong El Niño years, the typical progression of hurricane activity from August through October appears more "compressed." While August might see a slight delay in storm formation, activity tends to peak more sharply around early September before declining rapidly through October and into early November. This contrasts with recent seasons where cyclonic activity has persisted longer.

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This occurs because it modifies the wind patterns over the Atlantic basin, which increases the so-called vertical wind shear, a factor that hinders the growth and strengthening of tropical cyclones.