In article ,
Jonathan Stott writes:
Scott W wrote:

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.

Are there any data on the accuracy of each 6-hour/12-hour output from
the models?

http://www.emc.ncep.noaa.gov/modelperf/

But if you can understand it you're a better man than me, Gunga Din.
--
John Hall
"Honest criticism is hard to take,
particularly from a relative, a friend,
an acquaintance, or a stranger." Franklin P Jones