You could certainly modify the text based comments within the .uhp file if you wanted. The original offered a response in case the user asked for tomorrow's forecast but it appears that perhaps the RSS feeds are no longer valid or being broadcast so I omitted it from my script.
The script in question is one from around 4-5 years ago and was originally written by Bill DeWitt, a very talented member who explored the finer points of Hal and helped push some limits with several nice plug-ins.
You can find this weather plug-in and more at his original Wiki site.
Also, you will need to obtain the necessary airport call letters for your nearest local weather report.
You can find Bill's Wiki here:
http://ultrahalscript.pbwiki.com/Have fun!