There's a local pond by me that is totally segregated from any other waterways (and Michigan obviously doesn't get hurricanes), and I know the owner personally, and the pond gets stocked in the summer with Frontosa and Koi. The pond had no fish, and the stocked Fronts and Koi only get fed once a week (they get everything else from the abundance of bugs). So far there has been no adverse effects (ie, no reports of Fronts or Koi where they shouldn't be) and every winter the Fronts are taken inside to the owner's 500g in-door pond. If you situation is similar, then go for it.
However, if it's just "some pond outside your house," that you don't own, don't know the owner (or atleast cannot speak to them), and are unsure if it could potentially flood into other waterways via Hurricanes or rains, then DO NOT stock it with ANYTHING. It can, and most likely will, turn out badly, for the local fish and ecosystem and your wallet alike.