You have the Madden-Julian Oscillation to thank for that ... You can see that bear out in this gif from NOAA: That’s not to say the MJO is responsible for all of this crazy winter weather.

There's a reason for that. It's called the Madden Julien Oscillation. The Madden Julien Oscillation, commonly referred to as the MJO, is a wave pattern that expands across the entire globe and ...

One of them is the Madden-Julian Oscillation. This pattern, discovered in 1971, is a region of both enhanced and suppressed lift resulting in enhanced or suppressed rainfall and storm development.