There's two different XML formats I've seen the feed use, I don't know if it's related to the particular weather station or they just occasionally mess with the formatting.
The variable uses the name of the location, not the traditional ID's you're used to (so in my case here at work, it's "FL/Hurlburt_Field", and the feed also doesn't report a numerical weather condition normally used for the icons. The and variables are end uses in my skin, which when using the original feed format allowed me to create a line graph of the temperature over the course of the day.
This one's what I call the "lame" variant, and is what is currently active on my end:
And this is the original version, which has precise temps in the forecast and slightly different wording throughout.