I think your rainbow looks great Anna,its not offen you see a double like the one you posted.Most all our meaner storms comes at night,we get to see several rainbows every year.We have several little short thunderstorms with bright blue skys fallowing them making it hot and steamy this time of year.Its not uncomman to see several thunderheads building each day,some towering high into the sky and some of the colors they bring forth is outstanding as they disappear into the night.