Date of sighting: July 12, 2013
Location of sighting: Wilsonville, Oregon, USA
2nd Source: http://www.kens5.com/
WILSONVILLE, Ore. -- Several KGW viewers noticed rainbow-colored clouds over Wilsonville and quickly sent us these amazing photos. Portland meteorologists said the phenomenon could be iridescent clouds, which occur when parts of clouds with smaller particles become separated and refract light.