The Natural Philosopher wrote:

Terry Fields wrote:
Roger wrote:

I am tempted to write to the Met Office about the bizarre way they
terminate their smoothing filter. Doubt if that will even provoke a
response let alone nudge them onto something a bit less extreme.

I'm sure you'll get a reply, but the chances are it will be some sort
of fob-off.

But why have a smoothing filter at all? Why not perform some sort of
regression or other statistical analysis on the data set?

What is a smoothing tool if not an example of that?

It's the difference bewteen 'smoothing' the data, which doesn't seem
to do anything but tidy up the appearance, and statistics that tell
you everything about the data - IOW, chalk and cheese.