noun
deepest snow; maximum snow depth
Technical term for the greatest depth of accumulated snow recorded at a location over a period, commonly used in weather reports and avalanche forecasting.
今冬の最深積雪は2メートルを超えた。
The maximum snow depth this winter exceeded 2 meters.
気象庁は各地の最深積雪を発表した。
The Japan Meteorological Agency announced the deepest snow depths for each area.
Compound of 最深 (deepest) + 積雪 (snow accumulation). A straightforward technical term.