noun, noun which may take the genitive case particle 'no'
snow-laden clouds; cloudy sky that looks like snow
Describes a winter sky heavy with clouds that seem ready to snow. The term is somewhat rare and poetic.
朝から雪曇りの空で、今にも降り出しそうだ。
Since morning the sky has been heavy with snow clouds, looking like it could start snowing at any moment.
Compound of 雪 (yuki, 'snow') and 曇り (kumori, 'cloudiness'). The reading ゆきぐもり reflects rendaku voicing of the second element.