noun
thunder before a snowstorm
A seasonal word (kigo) for late winter, referring to thunder that is believed to herald heavy snowfall.
雪起こしが鳴ると、もうすぐ大雪になるという。
They say that when thunder before a snowstorm rumbles, heavy snow is on its way.
Compound of 雪 (yuki, 'snow') and 起こし (okoshi, 'raising' or 'causing'), literally 'snow-raising', referring to thunder that is thought to bring on snow.