Very rare rainbow clouds appeared for three days in a row in the Arctic over Christmas

• Arctic observers got a rare festive treat when rainbow-colored clouds appeared in the skies.
• So-called polar stratospheric clouds were seen over Norway, Sweden, Finland, Alaska, and Scotland.
• Some saw the clouds for three days in a row, a very rare occurrence.

Arctic observers were granted a rare spectacle when rare rainbow-colored clouds streaked the skies ahead of the holiday season.