snow wedging is a mean of mechanical weathering
stand_underneath_when is not raining_or_snowing. snowing is precipitation_process. cold_forming is forging. cold_forming is not forging. snowing is not precipitation_process. weathering is physical_event. stand_underneath_when is raining_or_snowing. snowing is atypical_thing. weathering is becoming. snowing is not atypical_thing.