LEGEND FOR ALL SYNOPTIC MAPS 



Plotting Models 



Land Stations 



Ship Reports 



The international weather code is used for all symbols with 

 temperature in degrees centigrade and pressure in millibars. 

 The following letters have the meaning as indicated: 



U Relative humidity (tenths) 

 W Past weather 



ft Sea temperature, 4- used to distinguish it 

 from air temperature 



/% Direction and speed of ship (code numbers 0-9) 



Analysis Symbols 



AAA 



o o o o o o 

 • ••••• 



o o © o o o 



mbs 



Surface 

 Surface 

 Surface 



cold front 

 warm front 

 occluded front 



mT 



Air 



Surface stationary front 



Weak cold front 

 Weak warm front 

 Weak occluded front 



Isobar drawn for every 5 mbs. 

 Precipitation 



Air Mass Symbols 



mP Polar maritime fTlT Tropical maritime 



CP Polar continental cT Tropical continental 



W Air warmer than underlying surface 



K Air colder than underlying surface 



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