NWS provider file for Weather Monitor plugin - (NWS = National Weather Service)

Here are some weather condition terms used by the NWS:

http://www.crh.noaa.gov/oax/sky.shtml

I've also sent them an email asking if there is some consolidated list somewhere.

Edit: A NWS representative has already given me a reply, if you can believe that. I was pointed to the URL below. This information isn't very helpful, really.

http://www.erh.noaa.gov/er/bgm/ProductsGuide/anat.html