That's a cool time lapse shot. I took these pics a few minutes apart from the top of our 100' silos here at work in July '12...the rainstorm was right over Deepstep GA, about 8-10 miles away. It only rained a swath about 1 1/2 wide and dropped about 1" in 30 minutes
The sun was bright that day, when I first got on top of the silo as the first rain band passed by, it was like looking at the full moon, just a round ball. Right after that is when I got the pics.