noun
morning rainbow
A rainbow seen in the morning. In Japanese folk belief, a morning rainbow is considered a sign of coming rain.
朝虹が出ているから、今日は雨かもしれない。
There's a morning rainbow, so it might rain today.
祖母は朝虹を見ると傘を持っていくように言った。
My grandmother told me to take an umbrella when she saw a morning rainbow.