How do I create a very specific RSS feed from a webpage?

Hi Brody! The web service https://ifttt.com/ (If This Then That) is designed for stuff like this. You can use it to, for example, automatically tweet something when a certain keyword shows up in an RSS feed. But I'm not sure it will work for this situation because the "Wind" keyword is buried in the middle of a bunch of other data, and I don't know how to use IFTTT to extract just the wind speed data from the RSS content. But IFTTT might be a good place to start.

You mean the current conditions wind entry from http://www.weatheroffice.gc.ca/rss/city/nl-17_e.xml? Is this a thing you want to display embedded on another website, or log in a database at regular intervals, or what?

This seems like anhttp://www.perlmonks.org/?node_id=542341. What are you actually trying to do once you have the RSS feed? We may be able to offer better solutions based on what your end goal is, instead of just this specific implementation option.

My plan is to link the data to a twitter account using twitterfeed. I want it to be automatic, every hour or two hours or whatever...

Thanks Oulipan - This is almost what I want. I was actually looking to do this for Wreckhouse's weather. Just realized I posted the wrong EC weather page in my question. IFTTT has weather for many areas but not Wreckhouse. I bet if I drill down enough in its options, I may find a way to do this.

If IFTTT doesn't give you the control you need, you could set up a cron job (linux) or schedule a task (windows) to run a script (shell, perl, php, python, ruby, powershell) that fetches the page, retrieves the wind speed with a regular expression, then uses the twitter API to create the tweet. The important key words are in bold. Use the above when you talk to a friend who's good at that sort of thing, or learn it yourself in a day or two and put it together.

You could use http://pipes.yahoo.com/pipes/

Oh, cool. Yahoo Pipes has regexes? That's a Neat Thing.

Thanks you zsazsa! That is exactly what I want. Just going to clone and edit the location slightly. Thanks everyone. I sort of know Regexes is what I needed to learn but to busy/lazy to learn the programming.