
Ka Piʻo Ānuenue Pālua
(Double Rainbow)
There is no specific definition for the double rainbow in the dictionaries. Therefore the definition of the Piʻo Ānuenue will be used here: According to the Hawaiian-English dictionaries, this is the definition o this type of rainbow:
Pukui/Elbert: 1. nvs., Arch, arc; bent, arched, curved; to arch, of a rainbow.
Parker: 1. v., To be bent; to be curved; to bend around as the arch of a rainbow; to curve as an arch; to bend as an elastic substance.

Piʻo Mōʻī
Piʻo Aliʻi
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This is the portion, a section perhaps of a full circular rainbow. that is suspends and stands perhaps in the blue vault of heaven.
The frequent sightings of the double rainbow endure, named the Piʻo Mōʻī, namely the inner (primary) arc, and the Piʻo Aliʻi, namely the outside arc. The strength of light and the glow of the colors of the Piʻo Mōʻī is 3 times (that of the Piʻo Mōʻī)

Signs and omens
This type of beautiful rainbow is often seen in Hawaiʻi. It can be a sign or omen for a variety of things as described below:
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According to the legends This type of rainbow did not appear in the legends that were analyzed..
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When does it appear
At the time the fine light rain, a when the height of the sun arrives at an angle of 42 degrees, the rainbow of the Piʻo Mōʻī is not seen, namely the inner (primary) rainbow. And when the height of the sun reaches and exceeds an angle 54.5 degrees, the rainbow of the Piʻo Aliʻi is not seen, namely the outside arch. This is one of the mysterious things of the work of the gods (Nāwahī, 1893).
Photo by: Kelly Headrick | Dreamstime.com