noun
Snow that remains on the ground after the main winter season, often into early spring. Evokes a sense of seasonal transition.
See also: 残雪
春になっても、山にはなごり雪が残っている。
Even in spring, lingering snow remains on the mountains.
noun
late-winter or early-spring snowfall
Snow that falls at the end of winter or beginning of spring, often melting quickly. Carries a poetic, fleeting nuance.
三月に入ってから、なごり雪がちらついた。
After March began, a late-season snow fluttered down.
残雪 is a more general term for remaining snow, often used in mountaineering or weather reports. なごり雪 has a more poetic, seasonal nuance, often associated with the end of winter or early spring.
Compound of 名残 (なごり, 'remnant, traces') and 雪 (ゆき, 'snow'). The term evokes the last traces of winter snow.