This is a classic case of subseasonal tropical forcing being composed of multiple, competing circulation signals (in this case, Kelvin Waves) all competing for dominance in RMM, VPM, or OMI phase space. While RMM will show the MJO in the West Pac, it's really not that simple here pic.twitter.com/iBkLoEuCsM

— Eric Webb (@webberweather) December 20, 2019