Global climate pattern shows signs of shifting. What will happen in the US?
Story by Doyle Rice, USA TODAY • 17h
Early signs of a possible La Niña fall and winter are emerging in some climate models, federal forecasters announced July 10.
La Niña is a part of a natural climate cycle officially known as El Niño – Southern Oscillation, called ENSO by scientists. The cycle swings between warmer and cooler seawater in a region along the equator in the tropical Pacific. La Niña is marked by cooler-than-average ocean water in the region.
It is one of the main drivers of weather in the United States, especially during the late fall, winter and early spring. It's the opposite of the more well-known El Niño, which occurs when Pacific Ocean water is at least 0.9 degree warmer than average for three months.
La Niña and El Niño typically have minimal impact on summer weather in the United States, other than some effects on hurricanes. Winter is the one season when they have the most impact.
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