So, between the values of the first and last 50 years. So it backs my point and still denies yours.

This time, do you want to cherry-pick a specific date range that actually fits the results you expect from your apparently pre-existing belief there's no trend, or are you going to accept that line go up?

Save you some time, here's the rolling averages with 10, 20, and 50 year horizons: https://pasteboard.co/rQ49kvY8YeBU.png

Average is forward from any given date on the chart and standard spreadsheet use of "average" function, which is why (if you look closely) you'll see the right side is spiky and they all line up perfectly when that's clearly silly.

You can obviously compute a trend line on this data set, as with any. That doesn't mean the trend matters or can be described in normal English as "storms getting worse", which is why even people like the British government who are fully on board with Net Zero don't try the argument you're trying here. They explicitly say the trend line isn't compelling, even.

So what point are you trying to make, exactly? That they're wrong and it is compelling? Or that on HN there's a rule against describing data in normal ways?

Let's boil this down to the only thing that matters: do you think people should be alarmed by this data? If so, why, when others who have studied it don't?