I’d suggest looking at the standard aviation METAR weather report format, which could be adopted to encode current locally observed weather conditions into a 20-character packet…
Reference http://en.wikipedia.org/wiki/METAR, particularly the section of the article on North American METAR codes.
It would be cool if dplus command could query a specified N4XI WXN system for current observation data and return a pseudo-METAR encoded report…
73,
—john—
KA8TNA