The word 'snowplough' explicitly refers to an activity that happens in snowy conditions. School was canceled because the snowplough couldn't clear all the roads.
Pro Tip 2/3
Emergent Context
Expect to see or use 'snowplough' often in narratives or news related to winter or cold regions. The local news showed snowploughs working throughout the night.
Pro Tip 3/3
Public Service
A 'snowplough' usually suggests a service provided by authorities or contractors to maintain safe travel. The city's snowploughs keep the streets walkable during winter.