Dave.C wrote:
I know it's all been said before but you can see why the Met Office doesn't
seriously forecast to the public more than 5 days in advance. I don't know
if it costs any more for the GFS model to be run past 7 days but if it does
it is a waste of money. There can be little value in a model that can
oscillate member runs by 14C (850 hPa values) every six hours other than to
conclude "anything can happen" -because we know that don't we!

Dave

But it is for reasons of hinting at coming trends that they run these
models - I'd be interested to see the statistics on how correct the GFS
has been for anything past plus240z over the years.

You'd think we'd all learned our lessons by now about the rogue GFS -
but like lemmings we go back time and again...