SNOWTAM is a special series NOTAM given in a standard format providing a surface condition report notifying the presence or cessation of hazardous conditions due to snow, ice, slush, standing water or water associated with snow on the movement area.

The maximum validity of SNOWTAM is 8 hours and a new SNOWTAM is to be issued whenever a new runway condition report is received. The new SNOWTAM cancels the previous one.

The SNOWTAM reports runway condition code for each third of the runway, percentage coverage of the surface, depth in millimetres and a verbal description. For instance: 3/3/3, 100/80/80, SNOW/SNOW/SNOW.