In reply to phizz4:
> It would also be worth mentioning that today's forecasts are rarely wrong other than in minor details but what can vary is the timing. A warm or cold front can come through faster than predicted (or more slowly), which makes people think that the forecast is wrong, when it isn't.
I live in Ballachulish and would say that the weather forecast can get things exceptionally wrong at times. There are a couple of reasons for this
1) Slight shift north or south of a westerly weather system. If you've got a river of rain approaching south of your position, you could have a nice sunshine and occasional shower forecast. If the weather shifts northward, you could end up with a complete deluge.
2) We've had many days where the weather forecast said no rain at all and even the radar said there was no rain at our location and yet we were getting soaked. This is generally very localised as the people in the next valley had sunshine.
It's best to take a look at the weather map within a 50miles of your planned location as whatever the forecast there is, could end up over you (obviously some conditions are topographical so take that into account.