La Nina, the flip side of El Nino, is the periodic cooling of the central Pacific Ocean that affects weather patterns around the globe. Predictions called for fleeting La Nina conditions that could last through February.
It's "anticipated to be a weak, short-lived event," said Mike Halpert of the National Oceanic and Atmospheric Administration's Climate Prediction Center.
In the United States, the arrival of La Nina usually brings wetter winters to the northern Rockies, Pacific Northwest and Ohio Valley and warmer, drier conditions to southern parts.
There's a 55 percent chance La Nina will stick around through winter, causing the drought to persist in Southern California and regions in the Southeast and southern Plains to experience dry conditions, NOAA said.
NOAA plans to release a winter forecast update next week.
http://abcnews.go.com/Technology/wireStory/weather-forecast-la-nina-winter-43445143
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