Sometimes if the cirrus is thin enough you get plenty of shortwave rad coming through and longwave IR being reradiated back down giving you a bit of a greenhouse effect. But if you're going to thicken up the high/mid level clouds enough you're going to limit that mixing height and keep higher dews at the sfc. Last year the weenie 2m products were spitting out 100s, but IIRC they were trying to mix out dews. What verified was less mixing, mid to upper 90s, and monster dews. So I think this is a pick your poison deal. Either we mix down upper 60 dews and allow the atmosphere to heat to ~100F at the tarmacs or we have less mixing and let the dews pool and we end up with 96/75 swampazz like last year. Of course a full-fledged MCS and outflow boundaries will muck that up quickly. It's still a few days away too and I know how everyone here loves in-depth warm season temp and dew analysis.