Snow Snowfighters Training Program Know Different Types of Snow Snow occurs when water vapor in an air mass is cooled below freezing. Density of snow varies greatly. Wet or heavy snow can often be plowed away.
Time is of the essence.
Use of reliable weather forecasting services allows for crew readiness in advance of storms. Winter storms produce a number of hazardous conditions other than snow. Even without rain, ice may occur when moist air contacts a cold surface, particularly on bridge decks. Rain may freeze as it falls on pavement. Anti-icing can be particularly beneficial in frost prevention.