I used to hear them all the time in Texas when I was a kid in the 70s. We were fairly close to an air force base and we'd be out in the yard on a bright sunny d

I used to hear them all the time in Texas when I was a kid in the 70s. We were fairly close to an air force base and we'd be out in the yard on a bright sunny day when we'd hear a thunderclap, as if lightning had struck less than a mile away. We'd look up, see a contrail, and say "Oh." It never caused any damage; it was just surprising.