My threshold for what would be “acceptable” is 4” or more, and 0” of plain rain.
I see the NWS hasn’t issued a watch yet. We’re about 48 hours, maybe a little less, from onset, depending on which model you like. Is the lack of a watch due to not wanting to confuse the non-weather-enthusiast peasants before this event is completely done, or because they’re nervous about issuing one after this past model bust?