An incredible phenomenon showed itself over northeastern states. The "fire rainbow" looks like a cloud, but it seems to be a fire of color. It's technically called a "circumhorizontal arc".
Meteorologist Roger Gass explains, "Circumhorizontal arcs occur when the sun is situated high in the sky -- higher than 58 degrees above the horizon -- and its light is refracted by ice crystals suspended in the atmosphere, most commonly in cirrus clouds. "When the sun hits the ice crystals, you get pretty colors," Gass explained to SFGate.com.
These are gorgeous.