Yes the yr.no site is excellent and it is a great pity that the UK Met Office dont do better.
This discussion about forecast accuracy is one I often have with my wife. I have had a weather station now for 6 years and also produce forecasts for my local area in house using some very clever software written by a guy in the USA. The problem with sites like UKMO and the BBC etc is that although they say it is local it is not really local, they have to generalise on a quite significant area and therefore when they say sunny intervals or showers you may see all sun or all rain in your location. My local forecast is really just for the area centred on Broadstairs and for about a 20 mile radius, and it works out quite well for the initial 24-48 hours, usually on a par with what happens as recorded by my weather station. If you were to pay the UKMO for such a local forecast then it would probably be pretty accurate.
Another gripe I have with UKMO is that the data they use is only available if you pay shed loads of cash for the privilege, however by accessing the same model data from the US Met Service I can get it for free!
One thing the UKMO is now doing is building the
Weather Observations Website (currently in beta testing) which is similar to the Weather Observer program in the USA and allows amateur weather observers to provide additional data to them.
Stuart