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.

44 now.

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.

The QBO is an upper atmosphere wind oscillation index. Because of this, it doesn't have many direct effects on the surface. This is a great site, where you can look at correlations of all kinds of different variables: Linear Correlations in Atmospheric Seasonal/Monthly Averages: NOAA Physical Sciences Laboratory The QBO's greatest cold season effect is on the 10mb vortex: +QBO favors -10mb, -QBO favors +10mb. When coupled with ENSO it's correlation is about 75% on the winter 10mb vortex (ideal correlation is +QBO/La Nina = -10mb, -QBO/El Nino = +10mb. +QBO/La Nina, favoring a strong 10mb vortex correlates to +AO conditions in the cold season pretty highly. Lately (the last ~15 years), a strong -10mb cold season vortex has also been correlating with -PNA conditions.