Some excellent sites for weather info:

• Live data from Readng
  
• Live radar/lidar data from Chilbolton
  
• Met Office radar - And easy access to forecasts
  
• Dundee satellite images - Requires a password - free registration
  
• Wyoming Upper Air Skew-T plots & data from all over the world.
  It's worth remembering some UK site codes as the map doesn't always show them.

  Site	Code
  Herstmonceux	03882
  Larkhill	03882
  Nottingham	03354
  Camborne	03808