Long range forecasting, is very vague and manly inaccurate.
I have a met office client on my books she tells me the weather can change with very little warning due to the jet stream
that affects the gulf stream or vice versa can't remember ,and the sea temperature in the Atlantic has a major impact on our weather.
If the Atlantic warms quickly in the spring this moves the Gulf stream south as it did last year then its wet and manly with low pressure.
She says they can predict long range but normally get it only 20% of what is predicted that far in advance right.
She told me its looking like a mild winter with average rainfall with the odd cold snap.
So more like bloody could lots of snow and we aren't going to get out from November to march.