MJO Forecast — AIFS-ENS

Real-time Multivariate MJO (RMM) phase-space forecast from the ECMWF AIFS-ENS ensemble (51 members to day 15), following Wheeler & Hendon (2004). Wind-only projection (U850/U200); amplitude is the radial distance (rings at 1, 2, 3). Observed track is recent ERA5/AIFS analysis.

Latest init: 2026-07-18 12Z. Drag the slider to step through successive forecast runs (oldest → latest) and watch the predicted MJO track evolve.

Updated 2026-07-18 18:19Z · Auto-generated from the AIFS-ENS open-data feed. Methodology: NOAA CPC / Wheeler & Hendon (2004), EOFs from NOAA OLR + NCEP wind with the 120-day low-frequency filter removed.