With all this bad weather we’re having at the moment I’ve found that the UK Met. Office’s rain radar service has been invaluable to see where the really heavy rain and snow is.
It updates every 30 minutes and even has an animated sequence of images over the past 6 hours or so so you can see the direction that the rain clouds are moving.
It’s really cool and can be found here – http://www.metoffice.gov.uk/weather/uk/radar/index.html
It covers the UK, Ireland, North France and North Belgium.
Update: Thursday 16th December 2010 – you may find this new page useful – http://www.south-wales.org/2010/useful-information-for-south-wales-snow/