A
cold-weather event, or cold episode, in contrast to El Niño, which is often referred to as a “warm event.” In
the United States, La Niña causes winter temperatures that are warmer than
normal in the Southeast and cooler than normal in the Northwest. The effects of
both El Niño and La Niña are seen more in the winter than in the summer. La
Niña impacts agricultural products and thus is watched by traders and others
involved in agricultural commodities. Typically the effects last for several
months to a year. La Niña is Spanish for “the little girl.” See also
El Niño.