Submitted by Nathaniel.Johnson on Tue, 2021-09-14 17:42

Note that the BoM uses different criteria for declaring El Nino and La Nina than NOAA, including a lower Nino-3 or Nino-3.4 threshold (0.8C below average instead of 0.5C below average). Therefore, it is possible both NOAA and BoM are right: the event might meet NOAA's criteria without meeting BoM's criteria.