El Niño Is Back but It’s Late, Weak and Probably No Big Deal

An aerial view of flooded houses at the "El Indio" settlement on the outskirts of Piura, in northern Peru, on March 23, 2017. Leo Ramirez/AFP/Getty Images

WASHINGTON—An El Niño, which can alter weather worldwide, has formed but it’s so weak and late that it shouldn’t be a big deal, U.S. forecasters said.

The National Oceanic and Atmospheric Administration announced on Feb. 14, that the climate feature formed in the central Pacific, but forecasters don’t expect it to last more than three or four months.