I also live in DFW (Euless) and I heard this about what would have been a month-ish ago. I mentioned to my roommate that the sky was loud today and he went out for a cigarette and came back in and said, "Wow. You weren't kidding." I didn't make the correlation so he had to go on to tell me he was talking about the sky. He said he had never heard anything like it and was trying to explain it away all day.
It lasted for the greater part of the morning I think, but I've come to ignore it. I've heard it before more than once throughout my childhood here (NRH) and never thought it was something natural, but I didn't think of it as being unusual either. I've always referred to it as the sky being loud.
I only googled it just now because I heard it for about four minutes a little while ago and I happened to have internet in front of me.
It would not surprise me at all if there were something more behind it. It's one of those things you've noticed, questioned, and promptly forgotten.

It reminds me of something else.

I remember growing up we always used to go to this park called Bear Creek and as you'd walk through it there were pastures among the trees. There was a large, cupping wall in the most profilic pasture that blocked out what laid beyond it on the right side. There were no signs or markings. This wall must have been two or three stories tall. It wasn't brick or anything that I would have dreamed of climbing on.
I was young and my parents didn't know what it was so I decided it must a place they had rodeos or perhaps it was used as a sort of colisieum. It was there probably more than twelve years.
So one day I was on a date and we went for a walk in the park and he insinuated that it was probably there to hide something. That NEVER dawned on me at all in all of those years. I forgot about it and months later remembered it and went out there with my best friend to find it gone. All that you can view from there now is a single house past where the structure once was. It doesn't look out of place but neither does it seem a suitable place for it.
The only thing that I can think of is that perhaps there was an oil well back there, but those are rather tall and I've never seen such a tall wall built around one. Perhaps they were going to build something there, but there's no evidence of that or any foundation laid. It seems like its only conceivable purpose was ruining the scenery. It really makes me wonder.