Usually "misleading" is what Trademarks are intended to prevent. If it's misleading (in the EU at least) then it's most likely an infringement.
"NOAA weather" as the app name implies that the direct source of the _app_ is NOAA, "Weather using NOAA data" and similar wording disambiguates and avoids trademark infringement (and/or passing off ["misappropriation"/misrepresentation in USA] - which is a very weak unregistered version of Trademark which this situation nonetheless appears to fall foul of).
It’s probably fine legally. They’re showing new NOAA weather data, so calling it a “NOAA weather“ or “NOAA Radar” is correct, just misleading.