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.
The maximum snow depth this winter exceeded 2 meters.
The Japan Meteorological Agency announced the deepest snow depths for each area.
積雪 refers to snow accumulation or snow cover in general, while 最深積雪 specifically means the maximum depth of that snow cover.
降雪量 is the amount of snowfall (often in centimeters of new snow), whereas 最深積雪 is the deepest total snow depth on the ground.
Compound of 最深 (deepest) + 積雪 (snow accumulation). A straightforward technical term.