The Pacific won't stop. We have ANOTHER Category 5, a Category 3, a Category 2 impacting Hawaii and another two developing systems likely to become hurricanes. A record-strong El Niño is helping induce record hurricane activity.
Has it seemed absurd? By some metrics, it's record-setting.
According to brilliant meteorologist Tomer Burg, the past 30 days have set a record for ACE, or accumulated cyclone energy, in the eastern Pacific. ACE is a proxy for how "busy" a stretch is... it estimates how much energy the storms are extracting from warm sea waters and expending through strong winds. It also takes into account storm size.
El Niño patterns begin with a warming of water temperatures in the central and eastern tropical Pacific. This is a record-strong El Niño, meaning sea surface temperatures are running 3 to 11 degrees above average.
All that hot ocean water heats the air above, causing it to rise. More rising air means more tropical waves and more hurricanes.
And once a hurricane gets going, it gets to feast on those warm waters – which in some cases are running 86 to 90 degrees! That means plentiful "ocean heat content" to sustain strengthening and, in some cases, rapid intensification.
Polo, for example, logged the second-fastest strengthening on record in the eastern Pacific, jumping from a 50 mph tropical storm to a Category 5 in just 24 hours. Only Patricia (2015) eclipsed that breakneck pace. (For comparison, that's three times faster than needed to count as "rapid intensification"!
Meanwhile, the Atlantic is silent. We *still* haven't had a hurricane – something that is unprecedented in the modern satellite era. Blame El Niño.
After all, what goes up must come down. All that rising air in the Pacific is balanced by subsidence, or sinking, in the Atlantic. The sinking air squashes storms before they can even form, and harsh upper-level winds tear them apart.