La Niña is likely to continue
On October 9, the Japan Meteorological Agency released a press release titled "El Niño Monitoring Bulletin (No. 337) -September 2020 Actual Conditions and October 2020-April 2021 Outlook".
In it, the points are shown as follows.
A La Niña phenomenon is believed to have started in the summer.
La Niña is likely to continue into winter (90%)
A La Niña phenomenon is expected to start in the summer.
Cold surface water in the central to eastern part of the equatorial Pacific is likely to persist through winter,
and sea surface temperatures in the eastern part of the Pacific are expected to remain below normal.
Based on the results of the El Niño prediction model, we estimate that there is a high probability (90%) of La Niña events continuing into winter
. (Japan Meteorological Agency/Atmosphere and Oceans Department)
La Niña winters get colder
La Niña is the opposite of El Niño, which has the effect of a warmer winter. Sea surface temperatures off the coast of Peru in eastern and South America continue to be lower than normal for a long period of time, resulting in higher temperatures. As a result, summer becomes hotter, and in winter, the winter-type atmospheric pressure pattern of high to the west and low to the east becomes stronger, and the tendency for the temperature to become lower becomes stronger. So-called "cold winter" will increase the possibility of "winter with lots of snow".
Expectations have risen sharply for this year's 2020-21 season.
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