Hi.
I believe that error is probably due to the same issues reported by eme jota ce. I've reported the issue to the NOAA web site administrator. I did receive a reply from them saying that they've forwarded the issue to a regional systems administrator. I don't know if/when they'll fix the issue.
Without editing the plugin.py file in the NOAA Weather Plus plugin, no, there's no way to "hard code" the URL in. However, you could change the latitude and longitude positions of your Weather Locale device in Indigo to a nearby more populated area that might work better.