snow up
verb2
UK, Passive, Usually To prevent (a person or thing) from leaving (a place) or using (a road or path) due to snow.
- Midway between these stations a plough with two engines, which had been keeping the line open throughout the Sunday, became completely snowed up, and another engine sent from the Arrochar direction with men to assist in digging out the plough itself was caught in a drift south of Glen Douglas.1941 April, “Notes and News: Railwaymen and Snow”, in Railway Magazine, page 177: