Above average precipitation and colder than average temperatures are in the forecast for much of the upcoming from February through April in the northern United States, says an advisory issued by NOAA’s Climate Prediction Center.
Scientists say there is a greater than 50-percent chance La Nina will also be in place February through April 2018.
This is the second winter in a row with a La Nina, and like last year, forecasters expect this one to be weak. Last year, this weather phenomenon extended from July 2016 to January 2017 before a return to neutral El Nino Southern Oscillation conditions.
La Nina (translated from Spanish as “little girl”) is a natural ocean-atmospheric phenomenon marked by cooler-than-average sea surface temperatures in the central Pacific Ocean near the equator, the opposite of El Nino (“little boy”).
Typical La Nina patterns during winter include above-average precipitation and colder-than-average temperatures along the northern tier of the U.S. and below-normal precipitation and drier conditions across the South.