Not a traditional rainbow!

Traditional rainbow...NOT!

About a half an hour ago...over the Heritage Station Musuem in Pendleton, OR. This isn't a rainbow in the traditional sense--it is caused by light passing through wispy, high-altitude cirrus clouds. The sight occurs only when the sun is very high in the sky (more than 58 degrees above the horizon.) What's more, the hexagonal ice crystals that make up cirrus clouds must be shaped like thick plates with their faces parallel to the ground. When light enters through a vertical side face of such an ice crystal and leaves from the bottom face, it refracts, or bends, in the same way the light passes through a prism. If a cirrus' crystals are aligned just right, the whole cloud lights up in a spectrum of colors.

This story is inappropriate and should be flagged for moderation. Please choose from one of the following options:

You have indicated this comment should be removed.

Close

The comment has been submitted for review. Thank you .

me says ... on Friday, Jul 2 at 2:29 PM

yea, when you se that take it as a sign that the next day probly wont be very nice out side.

themom51 says ... on Thursday, Jul 1 at 8:58 PM

Good catch on that and thanks for the meteorology lesson, too!

Anonymous says ... on Thursday, Jul 1 at 8:39 PM

Just like a rainbow in the dark...

Add a comment

Name:

Comment: 250 Characters Left

KATU.com and its affiliated companies are not responsible for the content of comments posted or for anything arising out of use of the above comments or other interaction among the users. We reserve the right to screen, refuse to post, remove or edit user-generated content at any time and for any or no reason in our absolute and sole discretion without prior notice, although we have no duty to do so or to monitor any Public Forum.