Research notes and updates from the team.
During July 2024, weakly positive sea surface temperature (SST) anomalies persisted over the central-eastern equatorial Pacific Ocean, leading to a NINO3.4 anomaly index value of +0.21 °C. The weekly-averaged SST anomalies in the NINO3.4 region were 0.0 °C for the week centered on Aug 07, 2024. This indicates an ongoing ENSO-neutral state in the equatorial Pacific Ocean.
Read more →The SST anomaly for NINO3.4 during the Apr-Jun 2024 season was +0.45 °C, and for the month of June 2024 it was +0.24 °C. The most recent weekly (week centered on 10 July 2024) anomaly in the NINO3.4 region was 0.3 °C, indicating that the tropical Pacific is in the ENSO-neutral state.
Read more →The IRI seasonal forecasts of precipitation and temperature issued this month are based on an objective calibration procedure that combines the NCEP-CFSv2, CanSIPS-IC4, COLA-RSMAS-CESM1, and GFDL-SPEAR, and NASA-GEOSS2S models. The climatological base period for normal is 1991-2020. The SST anomalies cited below refer to the OISST.v2.1 SST data set.
Read more →The SST anomaly for NINO3.4 during the Mar-May 2024 season was +0.79 °C, and for the month of May 2024 it was +0.31 °C. The most recent weekly (week centered on 12 Jun 2024) anomaly in the NINO3.4 region was 0.0 °C, indicating that the El Niño conditions have ended and that the tropical Pacific is now in an ENSO-neutral state.
Read more →The IRI seasonal forecasts of precipitation and temperature issued this month are based on an objective calibration procedure that combines the NCEP-CFSv2, CanSIPS-IC3, COLA-RSMAS-CESM1, and GFDL-SPEAR, and NASA-GEOSS2S models. The climatological base period for normal is 1991-2020. The SST anomalies cited below refer to the OISST.v2.1 SST data set.
Read more →The SST anomaly for NINO3.4 during the Feb-Apr 2024 season was +1.19 °C, and for the month of April 2024 it was +0.81 °C. The most recent weekly (week centered on 08 May 2024) anomaly in the NINO3.4 region was +0.30 °C, indicating that the El Niño conditions are now rapidly declining in the tropical Pacific.
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