紅こう葉よう前ぜん線せん

noun

autumn foliage front; fall foliage front

Meteorological term for the advancing line of autumn leaf coloration across Japan, analogous to the cherry blossom front.

• 今年ことしの紅こう葉よう前ぜん線せんは例れい年ねんより遅おくれている。

  This year's autumn foliage front is later than usual.