Since much of this thread consists of conversation in Irish, I'm going to give a summary of the discussion. Annraoi knows the song and the singers, but sought background information. Áine found useful information in an article by Julie Hennigan and a book by John Jude Devenney. The relevant sections quoted by Áine are in English in two messages posted on 29 Aug 2000. The English-language lyrics she posted are a different song, NOT a translation of Badaí na Scadán, and probably concerning a different tragedy. But the two quotations I mentioned tell you what the song is about.

Annraoi said John Jude might be John Ghráinne Ó Duibheannaigh, whom he knew and would be speaking to. If Annraoi did get any information from John Ghráinne, he hasn't returned to tell us (Is leor nod don eolach, a chara!) And then Niall and Áine discussed another well-known song from Rann na Feirste, "An Chéad Mháirt den Fhómhair".