VIDEO: Valentine's Day rainbow brightens stormy Bay Area skies

MARIN COUNTY, Calif. (KGO) -- A big, beautiful rainbow appeared across parts of the Bay Area during Thursday's storm.

Thanks to a high cloud base and a large rain shaft, the rainbow appeared much larger than the ones we usually see.

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Sunlight hits water droplets at exactly 42 degrees, where the light is refracted and then reflected to create a rainbow.

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