using API to build an audio file to be read on-air

Nextup has discontinued updating their Weather Aloud application which pulls (somehow, no one will admit to knowing how at nextup) data from the Wunderground site. I continue to pester them about exactly HOW they're pulling that data (API, other?) but until then I need to look for an alternative means to build a simple text file that the Text Aloud system (which they still support) can read and act upon.

Any thoughts?