Signatures update automatically everytime Astrospheric produces a new forecast. Simply embed the link where you want and the weather graphic will always be up to date with the latest info.
To get started, select the Settings icon on any of your favorite locations
Fix 1 : Select the settings cog on any favorite location
Fig 2 : Select "Create Signature"
Fig 3 : Select and copy the appropriate code from the Signature tool
BBCode can be used on some forums such as Cloudy Nights to embed an image directly in your signature, or in a post you're creating.
To save bandwidth, signatures auto cache on any device for at least 6 hours before checking the server for a new image.