As of mid-March 2025, the equatorial Pacific is transitioning from weak La Niña conditions to a ENSO-neutral state. This shift is marked by sea surface temperatures in the Niño 3.4 region that are now closer to average, with anomalies at -0.35°C for Feb, 2025, well above the -0.5°C threshold required for La Niña conditions. The IRI ENSO plume forecast indicates a high probability (91%) for ENSO-neutral conditions from Mar-May 2025, and these conditionAs of mid-March 2025, the equatorial Pacific is transitioning from weak La Niña conditions to a ENSO-neutral state. This shift is marked by sea surface temperatures in the Niño 3.4 region that are now closer to average, with anomalies at -0.35°C for Feb, 2025, well above the -0.5°C threshold required for La Niña conditions. The IRI ENSO plume forecast indicates a high probability (91%) for ENSO-neutral conditions from Mar-May 2025, and these conditions are favored to continue through Sep-Nov 2025. For the later forecast seasons, Oct-Dec 2025 and Nov-Jan 2025/26, there is no strong preference for any category, although La Niña is slightly favored over ENSO-neutral. The probability of El Niño remains very low throughout the forecast period, increasing gradually from 1% in Apr-Jun to 20% in Nov-Jan 2025/26.s are favored to continue through Sep-Nov 2025. For the later forecast seasons, Oct-Dec 2025 and Nov-Jan 2025/26, there is no strong preference for any category, although La Niña is slightly favored over ENSO-neutral. The probability of El Niño remains very low throughout the forecast period, increasing gradually from 1% in Apr-Jun to 20% in Nov-Jan 2025/26.
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