According to NOAA SciJinks, similar to a rainbow, a rainbow cloud occurs when small water droplets or small ice crystals ...

Tomorrow: Mostly sunny. Low chance of spotty rain in eastern Iowa. High around 85F. Winds SE at 5 to 10 mph. Tomorrow Night: ...

Shelf clouds typically form along the leading edge of a thunderstorm. As the storm pushes out cool air in a downdraft, it ...