One of the more interesting Google Maps mashups I’ve seen in a while, OMGRainbows! mixes information about where it’s raining in the United States along with the angle of the sun, and plots areas where you’re most likely to spot rainbows. To see a rainbow, you need to have the sun behind you, shining towards an area where there’s rain falling. If the sun angle is too high, you’ll a solid yellow overlay:
But if the sun angle is acceptable, you’ll get a plot in red that shows the areas where you could see a rainbow if the sun is visible:
And when night falls, you’ll get a dark overlay showing where there’s no sun to generate a rainbow:
And if you don’t understand the post’s “intense” title: