Concerning the National Oceanic and Atmospherics Association Weather Radio, who are Paul, Donna and Tom?

These three individuals are computerised voices introduced from the 1990s for the National Weather Service (NWS) broadcasts on the NOAA Weather Radio (NWR). Initially, NOAA staff at each NWS office would record the broadcasts manually on tape or digital media, to be broadcast. With the introduction of "Paul", a text-to-speech computerised voice, messages could be sent out more quickly.

Due to dissatisfaction with "Paul"'s voice, further voices are added, including "Donna" and "Tom", but also "Javier" for Spanish messages. These days, "Paul" has returned as an improved version, and "Violetta" has taken over Spanish.

https://www.weather.gov/nwr/automatevoice