Thunderstorms are uncommon in late November but on the morning of 25 November 2006 thundery showers persisted for several hours. Eventually, just after nine o'clock, this spectacular rainbow appeared. Note that the sky inside the bow is significantly lighter than it is outside. The optics involved in this phenomenon are fairly straightforward and are due to raindrops "inside" the bow from the viewer's perspective reflecting sunlight back at the viewer.
© Christopher Seddon 2008