Warm-pool ENSO index (Ren–Jin) — Forecast Context

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FORECASTCONTEXT.COM · THE LARGE-SCALE STATE BEHIND THE FORECAST BRIEFING MOTION OUTLOOK METHODS API ☀ AUTO

FORECAST CONTEXT

DATA THROUGH 2026-11-07 · UPDATED 2026-11-08 11:26 UTC

ERA5 + IFS2.5°DAILY

BriefingTropics & oceansOceans & ENSO

N_WP

Warm-pool ENSO index (Ren–Jin)

N4 − αN3 with α = 2/5 when N3·N4 > 0, else 0 (30-day means). — Ren & Jin 2011