MSL Chart Legends:

Wind Barbs Cloud & Percipitation
  Westerly 5knots (wind speed)  
 

10 knots (wind speed)

 
  15 knots (wind speed)   
  20 knots (wind speed)  
  50 knots (wind speed)   
  75 knots (wind speed)  
  Thunderstorm
  Shower
  Rain
  Cloudy Period
  Cloudy
  Main Cloud
  Fine

 

Pressure System Fronts
  Depression (Low)  
 

High

 
  Tropical Cyclone  
  Trough  
  Convegence Zone  
       
  Warm Front
  Stationery
  Cold Front