Yeah, at this point I'm not terribly worried about frost, more the warmer-season stuff slowing down some due to the lows in the upper 40s on some days. If this forecast holds, though, it does seem that I'd be better off leaving town with them in the ground.I did not see anything on there that even approaches a risk of frost. I'd put them out. I think you may have more issues with it being too wet though it should be dry when you set them out. But rain can sometimes show up earlier than long range forecasts predict. In some respects the rain after you set them out is a good thing, they will not need watering. There is a risk if they wilt down that a heavy rain could pound them into the ground, not sure how heavy those rains and thunderstorms are supposed to be.
Another potential issue is wind, a dry wind can dry out new plants. I don't think those predictions are strong enough to present much of a problem. Plus it looks like you will have cloudy weather so those winds should not be dry. The cloudiness should help stop the plants from wilting down.
I'd risk it. I think your odds will be better by setting them out than not.
I just looked back at this post, and what I planted was quite close to what was planned back in December. The main change is that I eliminated corn, replacing it mostly with more tomato plants. I also added bush beans and borage.OK. The plan isn't fully complete yet, but I thought I'd show the work in progress, as it's fairly close.
NWS said:Issued: 4:38 PM Apr. 15, 2019 – National Weather Service
...ISOLATED POCKETS OF LIGHT FROST POSSIBLE OVERNIGHT ACROSS
SECTIONS OF THE PIEDMONT AND NORTHERN COASTAL PLAIN OF CENTRAL
Winds will subside overnight, permitting temperatures to fall
into the mid and upper 30s by early Tuesday. Locations sheltered
by the wind will stand the best chance of seeing pockets of light
frost. Due to the expected isolated nature of the light frost, a
frost advisory is not needed at this time.