Creampuff
You don't know, for sure, what weather information was transmitted to and understood by the crew.
What we do know, for sure, is that there were patent errors in the weather information transmitted to NGA, and that there are patent errors in the transcription, in the ATSB report, of the broadcasts supposedly made to NGA.
All grey matter has wisdom in 20/20, unfatigued hindsight, but none has yet been discovered with ESP.
To answer that question the CVR would go a long way! Just because it was transmitted doesn't mean it was received on board NGA. It has always concerned me that the CVR/FDR were not recovered. Beyond all Reason!!!