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NOAA Marks The Return of La Niña

16 Oct 2021, 3:15 pm

FROM NOAA.GOV:

A La Niña has developed and will extend through the second winter in a row according to NOAA’s Climate Prediction Center — a division of NOAA’s National Weather Service. La Niña is a natural ocean-atmospheric phenomenon marked by cooler-than-average sea surface temperatures across the central and eastern Pacific Ocean near the equator and is translated from Spanish as “little girl.”

La Niña is one part of the El Niño Southern Oscillation (ENSO) cycle, which is characterized by opposing warm and cool phases of oceanic and atmospheric conditions in the tropical Pacific Ocean. Consecutive La Niñas following a transition through ENSO neutral conditions are not uncommon and can be referred to as a “double-dip.” In 2020, La Niña developed during the month of August and then dissipated in April 2021 as ENSO-neutral conditions returned.

“Our scientists have been tracking the potential development of a La Niña since this summer, and it was a factor in the above-normal hurricane season forecast, which we have seen unfold,” said Mike Halpert, deputy director of NOAA’s Climate Prediction Center. “La Niña also influences weather across the country during the winter, and it will influence our upcoming temperature and precipitation outlooks.”

This La Niña is expected to last through the early spring 2022. For the upcoming winter season, which extends from December 2021 through February 2022, there is an 87% chance of La Niña. Because of these persisting conditions, the Climate Prediction Center has issued a La Niña Advisory.

Previous La Niñas occurred during the winter of 2020-2021 and 2017-2018, and an El Niño developed in 2018-2019. When neither climate pattern is present, ENSO is neutral and does not influence global climate patterns.

On October 21, NOAA’s Climate Prediction Center will announce the U.S. temperature and precipitation outlook for winter, extending from December 2021 through February 2022. Here’s a look at what a typical La Niña pattern looks like in the winter for the lower 48:

Stay with WeatherNation for updates on what you can expect this winter.

About the author
Erik Kostrzewa was born and raised in the state of Michigan; spending much of his life in the suburbs of Detroit. Erik attended the University of Michigan and earned a Bachelor’s Degr... Load Moreee in Earth Systems Science and Engineering with a concentration in Meteorology. His first on-air job was straight out of college in Lansing, Michigan at WLNS-TV. After a few years, he moved an hour west to Grand Rapids to continue his career at FOX17 news. While in the heart of the lower peninsula, Erik covered a wide variety of challenging weather from lake-effect snow to derechos. Erik definitely has an interesting last name which comes from his Polish descent. If you are wondering how it is pronounced, the easiest way to say it is “Ka-Stree-Va”. Erik is thrilled to forecast on a national scale at WeatherNation and experience an even wider range of weather in Colorado! He is also looking forward to experiencing his first 14er on one of the many mountains in the state. Follow Erik on Twitter and Facebook!

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