Symbols are used on many weather maps as shorthand for the conditions at weather observing stations. Some of the most common symbols are listed below.
    Intensity
Phenomenon Symbol Light Moderate Heavy
Rain
Snow
Drizzle
Rain Shower  
Snow Shower  
Freezing Rain  
Freezing Drizzle  
 
Other Weather Symbols
Phenomenon Symbol Phenomenon Symbol
Thunderstorm Thunderstorm with Hail
Severe Thunderstorm Hurricane
Dust Storm Drifting or Blowing Snow
Smoke Haze
Sleet Fog
Tornado or Funnel Cloud Thunderstorm with Snow
Cold Front (Surface) Warm Front (Surface)
Occluded Front (Surface) Stationary Front (Surface)
 
Oklahoma Mesonet University of Oklahoma