The heavy snow fall alert flag uses the colours black and white. The background is black and in the foreground is a six snowballed pyramid, representing a pile of snow. The six snow balls are reflective of a six armed snowflake.
An image of a snowflake was not used since its image conveys a sense of the winter holiday and Christmas Spirit.
Photo Credit: http://renotahoe.about.com/od/renotahoephotos/ig/Reno-Snow-Pictures/renosnow12.htm