A hail storm 2 weeks ago chopped up about 50% of the canopy of my Celeste that is about 14 ft in diameter and 12 ft high. Along with the hail we also got about 4 inches of rain over 2 days. The hail was not big, dime size, but the volume and duration was long so there was quite a bit of damage. While I lost perhaps 10% of the fruit most stayed on the tree. May be the rubbery nature of fruit helped. They did get dinged which on the ripe fruit appears as a hard black spots.
Fruit started ripening a week after the storm. The fruits are quite a bit bigger than normal and delicious. Not the bloated up ones you get after a heavy rain.
So, I am not sure if it is the rain or the combination of rain, defoliation, fruit drop that helped make most all fruit large.
The attached pictures are from this mornings harvest. I have to harvest twice a day since they ripen so quickly. Temps have been near 100F.
I save a few choice ones for eating and the rest go into making preserves.