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La Niña: The latest weather update

Screen Shot 2021-11-15 at 2.21.48 PM

Source: Climate Prediction Center/NCEP/NWS and the International Research Institute for Climate and Society 11 November2021/Agbiz e-newsletter, 12 November 2021, photo credit: Rapler

La Niña is likely to continue through the Northern Hemisphere winter 2021-22 (~90% chance) and into spring 2022 (~50% chance during March-May).

La Niña strengthened in the last month, with below-average sea surface temperatures (SSTs) evident across most of the equatorial Pacific. In the last week, all of the Niño index values were between -0.7ºC and -1.0ºC, with the coolest anomalies in the Niño-3.4 region.

Below-average subsurface temperatures (averaged from 180-100ºW) were roughly thesame amplitude at this time last month (Fig. 3), and reflected the prevalence of below-average temperatures in the eastern Pacific Ocean. Low-level easterly and upper-level westerly wind anomalies were again observed over parts of the equatorialPacific, although weaker than last month.

Tropical convection was suppressed near and west of the Date Line and was slightly enhanced over Indonesia.
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