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Show A Halo Means? What does a halo around the moon mean? Does it indicate warm weather as some say? Does it mean it is likely to rain? A HALO CAN, and often does, give a clue about approaching weather. A halo is formed when high, thin clouds move overhead creating creat-ing the halo effect. These high clouds are composed of ice crystals which reflect the moon's light. Because a warm front always al-ways moves in overhead before be-fore its mass passes over the immediate surface directly before be-fore the leading edge, one can often detect its approach, either in daylight or at night. AT NIGHT the high clouds producing the halo produce a sign of probable rain. |