cable hum after thunderstorm.........

If it has come and gone before it is very likely moisture somewhere along the line. If when the weather clears and things dry up the hum goes away this is probably the cause. It happens all the time to telephone lines, especially in remote areas.

Thanks guys, I am out in a rural area I will check basement also.

well tonight I had a brown down of power and poof hun is gone...go figure!

I live in an old house and have problems with the cable creating a hum with storms also. My cable originally hummed all the time. I reported a ground problem with Time Warner. Time Warner came out and attached the outside cable box ground to the main house ground. This fixed my hum problems except for when storms occur. I hope somebody will have an answer on this thread.

I guess I should add I live in a rural city in Texas without a basement. My house ground is a 8 foot copper ground rod with a heavy copper wire running from the breaker box to the copper rod.