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So, I was saying that we were expecting this to occur. The models were modeling this. I wasn't sure what the effect was going to be on the surface, but we knew that something was going to happen in the stratosphere and so true it did. So between the 10th of November and the 13th, the Rosby waves did trigger sudden stratospheric warming and that created a disruption. So the Rosby waves are these big waves that form for a number of reasons within Earth's atmosphere. And they basically bump in, if you can imagine the polar stratospheric vortexes, like a record and these waves are sort of like a fist or something coming up and hitting that record, it's going to slow it down, it's going to take away momentum. And that's what we saw happening. And the result of this is that we've actually seen the earliest November wind reversal of the stratospheric polar vortex on record. So it's two weeks earlier.