On Wed, 2 Sep 2009 at 08:25:40, Will Hand
wrote in uk.sci.weather :

If only that set-up would wait 3 months...

Any forecast beyond 5 days needs to be taken with a huge pinch of salt
at this time of year, despite any apparent consistency. Hurricanes can
develop quickly and unexpectedly and have great potential for altering
the strength of jets and their orientation as they become extra-tropical.

ISTM that even the most vigorous storms bounce off high pressure cells
like peas off an elephant, though...
--
Paul Hyett, Cheltenham (change 'invalid83261' to 'blueyonder' to email me)