In article ,
Dawlish writes:
As an extra: the MetO have not picking up on this in their 6-15 day
précis, though to be fair, this was last updated yesterday morning.
It shows how quickly the models can change. Why the MetO
doesn't update this more frequently has always been a mystery to
me.

Presumably they don't see any need to update a forecast of something
that's at least 6 days away any more frequently than once a day. The
longer the range of a forecast, the less frequently it needs to be
updated, but of course it's open to debate where the line should be
drawn.
--
John Hall "He crams with cans of poisoned meat
The subjects of the King,
And when they die by thousands G.K.Chesterton:
Why, he laughs like anything." from "Song Against Grocers"