I remember that from my summers in Boulder in the late eighties. Good times. For a while there would be a thunderstorm every afternoon between about 5 and 6, which everyone could see coming off the Front Range from a long way off, and I'd have to make the call of whether to try to bike home before it hit, or wait it out (once I guessed wrong and ended up cowering under a bridge near the creek, during what for all the world looked and sounded like the town being shelled). The tornadoes never hit Boulder, though; they touched down further east and chewed up Broomfield a lot.
As for the picture, you'll notice that the interior of the rainbow is actually pinker than the outside. Much of that pink light is actually being scattered back in front of the clouds, as part of the raindrop scattering that produces the rainbow; under more typical conditions this light is white in color. You can see a few of the diffractive supernumerary arcs inside the main arc, too.
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Date: 2004-06-12 07:11 am (UTC)As for the picture, you'll notice that the interior of the rainbow is actually pinker than the outside. Much of that pink light is actually being scattered back in front of the clouds, as part of the raindrop scattering that produces the rainbow; under more typical conditions this light is white in color. You can see a few of the diffractive supernumerary arcs inside the main arc, too.