Halo around the moon

January 9th, 2012 at 10:36 am by under 4 Warn Weather

A halo around the moon (or sun) is caused by cirrostratus clouds.  These are high altitude clouds, typically at 20,000 to 26,000 feet.  Cirrostratus contain ice crystals, moonlight hits these crystals and forms a halo.  Seeing the halo can mean inclement weather within the next 24 to 48 hours because the clouds can be followed by altostratus then nimbostratus clouds.

Halo around the moon taken by Mike Mills of Angola

14 Responses to “Halo around the moon”

  1. Sled Hill says:

    I saw the same thing with the Sun today.

  2. Sled Hill says:

    I meant ‘be’.

  3. Don Paul says:

    I’ll have a new thread by mid-evening, after I’ve gone through the ensemble output more thoroughly.

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