Cincinnati Ohio - When is it usually safe to dewinterize?

Welcome from a fellow Cincinnatian. As you know a couple of weeks ago, we set six all-time low temperature records in 7 days. So bets are off. Just don't listen to Tim Hedrick or Steve Raleigh, they seem to want to out-panic each other. Or as my S.O. puts it, "they never underestimate the weather."

Another variable is how your water lines run. Mine run under the TT in PEX so opening the cabinets and heating the interior won't help much.