The NWS talkgroups, by standard, are rarely in field radios. Without affiliations the traffic is often only on console sites. The current standard does allow patching to a STAC for those console sites without the NWS talkgroup, but again this is not often affiliated in the field thus not going out on the radio sites. The new NWS standard will drop the STAC patch for simplification. I believe the new standard goes into effect in 2018.