From USA Today (Doyle Rice):

“We’re not officially there yet,” AccuWeather senior meteorologist Brett Anderson says, “but we are trending towards an El Niño.”[…]

Anderson says that El Niño will most likely form by September…

Overall, other than a quiet hurricane season, the greatest weather impacts in the USA from El Niño tend to occur in winter, reports Michelle L’Heureux, a meteorologist with the Climate Prediction Center. Usually, she says, El Niño produces wetter and cooler-than-average weather across the southern tier of the USA and warmer and drier-than-average conditions across the northern half of the country, which is not good news for the parched upper Midwest.