A potentially significant El Nino is taking shape in the Pacific Ocean, with forecasters predicting a 61% chance it will develop between May and July. The National Weather Service Climate Prediction Center also predicts a 25% chance that the system could grow into a "very strong" event. This has raised concerns among meteorologists about rapidly shifting ocean-atmosphere conditions. The update comes after La Nina ended, leading to a transition in the tropical Pacific tied to the broader climate cycle known as El Nismo. Since 1950, there have been only five strong El Ninos and five very strong ones.