ECMWF also has the MJO signal (but not yet strong in the ensemble average). It is including this signal that the ECMWF starts growing cold anomalies during week 2. Should a stronger side MJO westerly event emerge, it will slow the development. pic.twitter.com/8HXmal3Qkx

— Paul Roundy (@PaulRoundy1) April 24, 2024