I’d argue the QBO has substantial sway over static stability in the deep tropics, which is why tropical convection and general circulation respond axisymmetrically to the QBO cycles.
In other words, the QBO’s effect on the mass circulation (and stratospheric vortex, by extension) directly affects tropical (and global) weather/climate patterns. It is through this medium of communication that ENSO/MJO forcings/etc are projected through.
Another year with a very sudden demise of summer. These stats are for MBY.
Average temp first 10 days of September = 67.3
Average temp for the last 10 days = 58.6
An 8.7 degree drop for two periods that are only separated by 10 days in between.
The thing is it can get very cold as early as late October historically speaking, and there has been lowland snow in October before. By the time we get to mid November SEA has dropped as low as 6 degrees which is pretty insane for so early. Pretty interesting that some of the stuff that has happened in November in Seattle is as great or greater than places that have much colder winters than SEA. Just another oddity of this climate.
Interesting considering that a lot of Americans would probably rather their child be killed in a school shooting than find out their child wants a sex change.