"Dawlish" wrote in message
...

The operational run is the one that the computer
has selected as the most likely to achieve outcome

Is it ? I though it was essentially just another model run albeit at a
higher resolution compared to the ensemble, and even the operational run
lowers in resolution at T+180 IIRC.

Either way the GFS appears to be getting all the headlines in this thread
when the best model in terms of medium range deterministic and ensemble
output is ECMWF, IMHO of course but also according to
http://wwwt.emc.ncep.noaa.gov/gmb/ST.../aczhist6.html

Jon.

PS I thought 18°C in Exeter was too warm last Thursday, roll on autumn !