This will play out very predictably. At some point she will finally issue this shelter in place order. And the question will inevitably be, "Governor, what has changed since yesterday at this time when you maintained this order was not yet necessary?" In response she will inevitably sound like the teenager who didn't do the assigned reading trying to fumble her way through an answer in front of the class.
There is no real tipping point. She's just holding off as long as she can. That's the plan.
Any illusion that there was some wizard behind the curtain with more knowledge than the rest of us should have been shattered the moment she publicly shared her "metrics." It's no wonder she refused to mention them for so long.