NOAA has issued that a strong El Nino weather pattern is establishing to rival the El Nino in 1997-1998.
According to Australia’s Bureau of Meteorology, all five NINO indexes averaged over the past four weeks, exceeded plus 1 degree Celsius, the bureau said in its fortnightly update on Tuesday.
That’s the first time this has occurred since the 1997-1998 El Nino, the bureau said.
“The area of warm anomalies in the tropical Pacific now more resembles a classical El Nino pattern,” the bureau said. “Sea-surface temperatures will remain well above El Nino thresholds at least into the southern hemisphere spring.”
El Niño is the warm phase of the El Niño Southern Oscillation (commonly called ENSO) and is associated with a band of warm ocean water that develops in the central and east-central equatorial Pacific (between approximately the International Date Line and 120°W), including off the Pacific coast of South America.
El Niño Southern Oscillationrefers to the cycle of warm and cold temperatures, as measured by sea surface temperature, SST, of the tropical central and eastern Pacific Ocean. El Niño is accompanied by high air pressure in the western Pacific and low air pressure in the eastern Pacific.
El Ninos happen every 4-12 years and can last from 9 months to 2 years.
Watch the Video for how El Nino will effect the USA this year: