"Will" wrote in message ...
NOAA provide the 100 day (just over 3 months forecast) on which that
winter
forecast was based. It is NOAA who are providing the runs that are
"diverging"
in January as Andrew Bond mentioned in his January section. Note that the
forecast does not extend into February as it is out of the 100 day range
of the
NOAA 100 day GFS product.
I'm not sure whether these 100-day forecasts are connected with NOAA:

http://ecpc.ucsd.edu/m2s/T2M/eur_t2m_wk.html

There are links to the NCEP and NOAA if you dig around on there, but
regardless of that I've been tracking the forecasts since July.

I've plotted the mean temperature forecasts for London on a graph:

http://www.medvale.fsnet.co.uk/chart2.gif

As you can see, that 100-day run is all over the place, no surprise as it's
a long way off and still an experimental product.