ILLUSTRATIONS UBT, 
COLD FRONT 
. WARM FRONT 
wi 
(3) 
=) 
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9:30 PMC -DECEMBER 7.1937 
Fig. 9 is the actual section from Kansas City through Chicago to Cleveland 
based on a pilot’s flight at night. There is a cold-front-type occlusion with the 
warmest air-mass entirely aloft here, causing snow to fall over a wide area. 
