A significant El Niño event seems to be developing in the Pacific Ocean, with forecasters estimating a 61% chance that this weather pattern will manifest between May and July, according to the National Weather Service’s Climate Prediction Center.
The recent forecast also indicates a 25% likelihood that this could escalate into a “very strong” El Niño, which has raised some eyebrows among meteorologists observing shifting ocean-atmosphere conditions.
This update comes on the heels of a La Niña event that shaped recent winters, which has now officially ended. This transition opens the door for changes in the tropical Pacific, linked to a broader climate cycle called the El Niño Southern Oscillation.
This cycle alternates between warm El Niño phases and cold La Niña phases, with periods of neutrality in between.
When the El Niño phenomenon diminishes, the ocean’s surface temperature becomes unusually warm, largely due to trade winds affecting the central and eastern tropical Pacific Ocean.
The implications of these shifts are global, impacting weather patterns significantly, including rainfall in places like California and storm trajectories. However, the outcomes can be quite variable from one event to the next.
Experts point out that El Niño typically increases the chances of wetter winters for Southern California, but historical data shows that outcomes can be unpredictable. For instance, the significant “Godzilla” El Niño of 2015-2016 didn’t deliver the anticipated rainfall in that area.
Since 1950, researchers monitoring ocean temperature fluctuations have tracked just five strong El Niño occurrences and five categorized as very strong.
“This potentially forming event has access to an unprecedented amount of warm water and has produced stronger westerly winds than any previous events,” noted Paul Roundy, an atmospheric scientist. Despite this, he emphasized that it’s premature to make definitive predictions about next winter.
