We had a lot of unstable air flowing over us on Saturday so I took myself out a couple of times and here's the sequence of photos I took starting at 3.00pm home at 5.00pm and then out again at 7.00pm .I'd just left home heading for a local hill when I saw the rainbow ahead of me so I pulled over. Experience tells me to take the shot not wait until I get on the hill hoping it's still there and get what could be a better shot-as you see when I got to the hill there wasn't much of a rainbow there.The sky was ink black too. Photo 10 -3rd. from last-the cumulonimbus cloud (anvil shape,although the left side is obscured)- produced a few lightning strikes shortly after I took the photo. I was up at about 900 feet on top of a hill.