596 MECHANICS OF PRESSURE SYSTEMS 
NOV. 10,1948 
300 MB 0300 Z 
NOV. 10, 1948 
500 MB 0300Z 
NOV. 10,1948 P 
SEA LEVEL 0300Z 
N10" 100° 30° 
Fie. 14.—Structure of maturing frontal cyclone at sea level, 700 mb, 500 mb, and 300 mb, on November 10, 1948, 0300Z. Upper 
winds: Half barb 5 m sec“, full barb 10 m sec“, triangular barb 50 m sec. 
