The arc of a rainbow

      An absolutely solid rainbow forming as a storm passes and gradually it's making a perfect arc from left to right.
      On a good day we sometimes get a perfect double rainbow but the wind this day is moving the rain storms and squalls along at a fair old lick.
      We tried to find the pot of gold at the end of the rainbow last year and failed, we just couldn't catch the rainbow up, so this time we'll make a cup of tea and watch the storms and rainbows come and go.