strong nighttime wind; night gale
A literary word for a strong wind that blows at night. Often used in poetry and classical literature.
A strong nighttime wind rattled the windows violently.
The poetry anthology contains many poems about the night gale.
Compound of 小夜 (sayo, 'night', a poetic term) and 嵐 (arashi, 'storm'). The exact historical derivation is uncertain, but it is a classical literary word.