follow-up on weather decoder

In an earlier post, I wrote:

If you want the latest forecast, go here, type in KNBG, select "translated," and click "get TAFs." Be aware, though, that there's a bug in the translation code: +FC means severe funnel clouds, not no significant weather.

I've been informed that the reason the decoder doesn't handle "FC" in a forecast is that forecasters aren't supposed to use that particular code in a forecast, or at least in the "TEMPO" sections of the forecast.

I'm still not sure why the author chose to print "no significant weather" on an unrecognized code, but I let the e-mail exchange drop at that point.