120 AIR MASS ANALYSIS 
COLD FRONT 
5:00AMC-DECEMBER B. 1937 
SCALE IN MILES 
Fic. 8 is from actual reports of pilots flying between Albuquerque and 
Kansas City in the morning of Dec. 8, 1987. A Pc cold front is advancing 
westward and lifting the Npc air over it and over the mountains. Snow 
squalls (indicated by crosses). 
