Hi John,

I don't have a profile at 5D but visit there and appreciate the work you do. I wanted to add to CR's observations:

CR  Reply to David Blackman - Thundering Booms


Shortly before CR first posted on thundering booms, I heard a similar storm entry up north.
My first thought was hunting guns -- but it was the middle of the day, off season. As the storm rolled in, it was paced like firecrackers popping louder than the distant thunder, and these sounds stopped as the storm arrived.

I don't think we were expecting a thunderstorm that day, because a family member had driven an hour away to work outdoors on a project. They remarked about the same popping noises 75 miles away -- which confirmed it was not local fireworks or hunters.

The only concrete explanation I've found is hail cannons owned by orchard growers, which are activated on the fronts, when hail is a risk. These are fired at regular intervals, which was not what we heard.

http://www.thelivingmoon.com/45jack_files/03files/Hail_Cannons.html

I am still curious, and will keep checking 5D for updates.

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Cashew