The code in an older post that talks about GeekTool calls the weather images to your desktop through Yahoo. They recently changed the location of these images so the GeekTool code no longer works. If you take the url at the beginning of your GeekTool script and paste it into a browser it will redirect you to the new url. Take that one and paste it back into GeekTool and it will be working again.
Sorry took so long to get this posted.