I was wondering the same thing. It probably had something to do with weight, leverage, and wind resistance combined with aging fiberglass.

That is a good idea! I will give it some thought. If you want I can give you the addresses of all of the thunderbolt locations I know of which used to be in Houston. I saw a screamer somewhere south by Matagorta while I was down there. I wasn't paying attention to what town I was in. I have some pic...

The penetrator is at a water facility at 504 Magnolia Avenue. The 4004/Vortex is at a fire station at 241 El Dorado Boulevard. I saw it on I-45 but wanted to beat traffic so I could not stop to look at it up close or take pictures. It looked like the same mounting design as the 3016 in Houston, at G...

I saw a penatrator and a whelen 4004/vortex in the Webster area. I think there is a model 5 in Sealy. It is rumored that a good number of the Houston thunderbolts were rounded up after they were removed and placed in an empty lot in the logistics complex. But it is only a rumor by fire station #7. I...

I used to live in the southwest houston area until I moved to Carrolton. As of now all of the thunderbolt locations that I used to know of have all been removed :( . All that is left in Houston proper is a whelen 3016 (at gessner and kempwood) and a whelen OA4 at the University of Houston. I have no...