As of today, all 122 NWS stations that the University of Iowa created rss feeds for are now published on Mastodon. The best way to find them is to search for "iembot_" and the three letter assigned to the NWS forecast office. In addition, the NHC Atlantic Officeis published at @iembot_nhc_atlantic . These are not official bots from the NWS or University of Iowa. There were put together by a group of "weather intensive" people in order to inform like minded Mastodon users of weather forecasts and other reports that the National Weather Service in the US sends out.
@LouisIngenthron @lckrohjr bots dot krohsnest dot com