I know it's not for me Warm, but I'm just 25 miles North of Omaha so thought I'd chime in.
I got worried about last nights predicted temps so I put tarps and trash cans on my Honeyberry bushes, since most of them are showing flowers.
My big concern was how far along my Redhaven peach is. PF17 & Madison have lots of pink showing, but hardly any opened up. But there was just too much pink showing and opened on the RH for me to sleep good last night! Anyway, they were forecasting a low of 29, so I had a pile of wood over near that area and at 1:30AM it was 33 degrees so I headed over and began tending a fire all night, just in hopes that it would create a micro climate that might help out some on the open petals... (not sure it made any difference, or if it would have mattered anyway. I think they can withstand that kind of stuff for a bit, but I kept telling myself I'd kick myself if I at least didn't try).
It got down to 28.2 according to my indoor/outdoor unit
I took a thermometer over and hung it on the fencing of the RH, opposite the fire. Don't know if it's an accurate one or not, I took it out of my garage just to have something to go by. So I don't know if it's even possible, but it showed about 34 degrees by the RH when it was 28.2 on my indoor/outdoor unit.
The birdbath about 15 yards south of the RH was iced over so I broke it to see how thick, and it was about 1/16th of an inch I'd say. The Rubbermaid trash cans I had turned over on the Honeyberries had a pretty thick layer of frost too.
Anyway, Mr. Redhaven would probably have been okay anyway, and if it zapped some of them I guess that'll be less thinning later on... (Man, I hope I get a chance to thin!!!)