A buddy of mine recently sent me a link to the official WTBTS Facebook page and I thought what the hey, let's see what they have to say about the question that made me fade in the first place. Much to my surprise, they answered! Here's what they said:
" ******* *****,
You may already be aware that the general position of Jehovah's Witnesses is briefly stated here:
http://m.wol.jw.org/en/wol/d/r1/lp-e/2008411
From the linked article it should be clear that we feel evidence remains that the entire earth was once flooded. The fact is that most of the earth is still "flooded" and would be further flooded if the ice caps completely melted. Many scientists, too, have also presented evidence related to such a flood.
This does not mean that we judge those who understand things differently as lacking in understanding.
We are not scientists, of course. and it is quite possible that when one adheres rigorously to scientific precepts, that it is simply not possible for many of them to accept a global flood just 4,000 years ago. Therefore, we have no doubt that scientists are generally quite honest about their understanding of the evidence.
Even many Bible scholars have rationalized or downplayed the literalness of the Biblical description. This does not mean that such scholars are being dishonest, either. For example, Hebrew expressions for the earth often refer just to the known areas in the Middle East. One Hebrew expression for the earth usually refers only to Israel itself.
On the other hand, we can still have certainty that a global flood occurred, just as it was described in Genesis. As the article mentioned, the Genesis account was validated again by others, including Isaiah, Peter and even Jesus.
Science must necessarily limit its reasoning to the available evidence and the available methods of understanding that evidence. This does not mean that new evidence will not be forthcoming. Nor does it mean that the same evidence already in front of us will not be re-evaluated based on forthcoming methods. Science continues to make advancements in many areas of study.
We would be happy to search out further details if you have more specific questions. Hopefully this may be helpful for now. "
Granted, they're still clinging to the global flood position but this is the first time I've ever seen them acknowledge even the possibility that the flood might have been local. I'm going to answer back with a few brief points regarding the ice caps and how ice cores show continuous glacial deposition layers going back hundreds of thousands of years and see what they say.