I've noticed the BOOMINGsound in the Spring thunderstorms in the last several years.

We had black clouds all over the place on Thursday afternoon. I experienced four thunderstorms.

I have antennas on top of the house,and the antennas,and radios are grounded with several deep ground rods. I have a couple of big copper wires coming into the radio room from the ground rods that have been driven into the ground.

I have one radio's outside antenna plugged into the scanner right now,but I'm going to unplug,and secure the antenna end into a glass mason jar that is filled with rubber,and has a ground wire right over the mason jar. Any lightning theoretically will follow the copper into the ground. I do this to often. To much information. Sorry BF