In the coming days, you'll see many Velocity Potential & Madden Julian Oscillation (MJO) plots on #wxtwitter.

Here, I show what they often entail for Atlantic tropical cyclone (TC) activity.

Notice the Atlantic is most active (🔴) when the MJO (🟢) reaches Indonesia (phase 4) pic.twitter.com/u4qtfUmVvq

— Eric Webb (@webberweather) August 2, 2021