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Did you see the moon's halo last night?

Weather Watch ...from the A.M.

A few weeks ago we had a beautiful show of optical effects; we saw everything from sun dogs to halos around the sun. Matt Miller wrote a great blog labeling the different optical effects here.

Last night we saw something similar, a halo around the moon. Here are a few viewer submitted pictures of the halo.

The picture above was submitted by Pete Haack

The picture above was submitted by Scott May

A halo around the moon forms in the same way a halo around the sun forms. Light is refracted (or bent) by ice crystals, making a 22 degree halo. A 22 degree halo is the most common. See the diagram below to better understand how the light is refracted and where the 22 degree angle comes from.

Weather folklore says that a halo around the sun or moon means bad weather is on the way. I've also heard the number of stars inside the halo indicates the number of days before the bad weather will arrive.

January 27, 2010

Weather Watch

Comments

sawman 7 years, 3 months ago

Didn't see the halo but Mars was very bright almost directly overhead when I was out very early morning.

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jmyrick 7 years, 3 months ago

I didn't see it either, saw, but I did see the "rainbows" in Baldwin City after blizzard No. 2. I believe that's what they're saying about the halos around the sun in this blog. They were cool. I'd never seen them before.

Of course, there's been way too much weird weather this year all the way around.

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