On 14/03/2013 09:28, David.WE.Roberts wrote:
On Wed, 13 Mar 2013 19:38:33 +0000, stuart noble wrote:

On 13/03/2013 17:48, Sacha wrote:
On 2013-03-13 12:01:24 +0000, zaax said:

According forecasters this summer is setting up to be another wet one
just ike last summer. So harvest will be down and floods every where

Given that any reputable met source will tell you that a 5 day forecast
is stretching it, that's not worth a passing thought.

And yet the Met Office make a pile of money selling long range forecasts
to farmers etc. I suppose these must be computer predictions based on
past weather patterns?

Look at http://www.ecmwf.int/.

They do medium range weather forecasts.

Thanks. Looks like only the first 6 days is free!

There are a lot of huge computers out there trying to predict what the
weather will do but if you are asking if a band of rain will pass over
Kent or Norfolk in six months time then there is no chance.

Short range forecasts are pretty good but then a lot of that is based on
using radar and satellites to watch weather systems heading towards us
across the Atlantic.

I think most of the longer term weather forecasting is probably based on
guessing where the jet stream is going to be in six months time.

Cheers

Dave R