YOU SAID:
Its gonna snow a good 15 cm
INTO JAPANESE
雪が15cmほど降ります
BACK INTO ENGLISH
It snows about 15 cm
INTO JAPANESE
約15cm雪が降る
BACK INTO ENGLISH
About 15 cm snow
INTO JAPANESE
約15cmの雪
BACK INTO ENGLISH
About 15 cm of snow
INTO JAPANESE
約15cmの雪
BACK INTO ENGLISH
About 15 cm of snow
Come on, you can do better than that.