Is it correct to say "it is pouring down snow". Usually one says pouring down rain,conjuring an image of rain being poured out of buckets. However, this doesn't seem right to use the idiom when speaking of snow.
Learn English – pouring down snow sounds wrong
idiomsword-choice
Best Answer
"It is snowing heavily"
"The snowfall is heavy today"
As you have very well pointed out, 'snowing' doesn't have many idioms attached to it, when compared to 'raining'.