Clark and I are probably in the same boat.
We have had some really cold weather this spring. The only thing that has helped is that we’ve had really nothing open. When the flowers are closed (pink) they can take an amazing amount of cold weather.
Things changed this last week. We had really warm weather. Two sunny days w/ temps in the low 80s and one day of 75. Plus the nights were warm. Flowers opened very rapidly. We have lots of flowers open. A few trees (like Saturn) have virtually everything open. Most trees have at least 75% open. Last night we got down to 27F here. That’s generally not too bad (although sometimes I have recorded a low of 28F and suffered tremendous losses).
But tonight pretty much all the weather stations are predicting record cold. The coldest temp for April 16th in KC is 28F set in 1921. Tonight all the weather stations are predicting to beat that by several degrees.
The coldest temp predicted is 24F for tomorrow morning. It wouldn’t surprise me. It’s 30 now and supposed to clear off later tonight, which will cause the temps to drop more.
In my notes in 2016 we had some really cold weather at about with the same amount of bloom. It got to 25F with about 1/8" frost on the trees. There was some significant loss, but we still harvested a fair amount of peaches (not great, but not horrible either).
Who knows what will be lost with tomorrow morning’s weather. I’m sure there will be a lot of loss, I just don’t know how much.
Generally you can’t tell how much is lost until the weather warms up a bit. I have celebrated before when we had some really cold weather and the flowers seemed to come through just fine, only to see the same flowers falling off a week later.
After the temps warm a little, you can tear some flowers apart to see if the ovary is alive, which can give some indication, but even then, as Clark’s link showed, if the funiculus is dead the fruit will abort.
I had thought we would dodge the bullet this spring because bloom is so late (compared to the last 3 years) but we never could get out of the cold weather pattern which is bringing the record cold tomorrow morning.