Our weather has been anything but dull over the last couple of weeks. On July 29th at 7:30 AM I was in the vicinity of the airport and saw a big rainstorm approaching. It was pushing a huge plume of clear air out in front of it that swirled upward into the cumulus clouds preceding the storms, giving them a ragged, turbulent look.
Wednesday night, August 5th, on my way to a meeting at the library, I saw a large swath of mammato cumulus forming at the bottom of a weather cell. These nodule-like prominences often precede hail or heavy rain, as the bottom of the cumulonimbus cloud sags downward under the weight of huge amounts of precip.