Probable La Niña in Japan

Japan is expecting a cold winter because of La Niña that is suppose to cause lower than average temperatures for a longer period of time. It would be the record 15th La Niña since 1949. La Niñas known to consist of more intense atmospheric pressure, heavy snow, and severe cold temperatures. In result, it can cause extreme rainfall and heat in the summer. "La Niña is officially recognized as occurring retrospectively when the five-month average temperature of the surface water in the observation point off Peru remains lower than the monthly average of the past 30 years by 0.5 degrees or more for at least six consecutive months." If seawater temperatures and weather conditions stay as they have been since November till February, it will officially be recognized as La Niña.



http://www.asahi.com/ajw/articles/AJ201712120038.html