Ryan, what extreme liberals say notwithstanding, the Magisterium teaches that
everything that is affirmed in Scripture is affirmed by the Holy Spirit Himself. Everything means everything. Since the Holy Spirit can neither deceive nor be deceived, this means that everything that is affirmed in Scripture is without error – regardless of the subject matter.
So, if one interprets a particular affirmation as being metaphorical in nature, that is OK as long as one recognizes the affirmation as being true and without any error. So for example if there were an affirmation in scripture that said, “It was raining cats and dogs” – one could interpret that as being metaphorical (which it obviously is) and understand it to be affirming that it was raining heavily – an affirmation that is true and without error. What is not permitted is to say that an affirmation in scripture is in error with respect to history but true with respect to its spirtiual meaning as explained above. So if one were to interpret the affirmations in scripture regarding Noah and the Flood as being metaphorical in nature and still true and without error, then that would not of itself contradict the Church’s doctrine. But if one were to say that some affirmations in scripture regarding Noah and the Flood were in error but that the spiritual meaning still remains true, then that would contradict the Church’s doctrine.
It’s also important to maintain an orthodox Christology.
I don’t know whether the magisterium has taught specifically on Noah and the Flood, but I suspect it must have touched on it over the centuries. I do know that recognizing a real Noah and the real Flood covering the whole earth is the historic, traditional Catholic position. This site has a nice question and answer page:
kolbecenter.org/q_and_a.html
“7. Does the church teach that the flood of Noah was a real historic event or a myth?”
But it’s under construction so no answer is provided yet.
Here’s the main page though:
kolbecenter.org/