As this report is being written the extent of the damage to the aircraft is still 

 being determined. So far the following damage has been found : a slightly bent 

 vertical lin, slightly warped flaps, tears in fairing joining the wing and fuselage, 

 untold snapped ri^'cts on all parts of the airplane, fuselage apparently twisted 

 around the CFC compartment, and the RF unit in the centre section of the bomb bay 

 was torn from its mountings. 



A very detailed inspection is being made to determine the full extent of damage. 



DAVID W. LYKINS, 1st Lt., U.S.A.F., 

 Aircraft Commander. 



A certified true copy : William S. Barney, Major, U.S.A.F. 



Discussion 



In answer to a question by Captain Brownjohn, Major Barney said 

 that vertical ascending currents of up to 5,000 ft. per minute had been 

 observed in turbulent areas of some typhoons. 



In answer to a question by Mr. Hutchings, Major Barney replied 

 that warm and cold fronts did not play much part in the actual formation 

 of a typhoon, but did appear later in the development. 



Temperature soundings in the eye of a typhoon appeared to give 

 higher temperatures than in the surrounding areas. 



Mr. Simpson presented an interesting observation that often the 

 cirrostratus cloud above a typhoon rises as the centre approaches, but 

 no explanation was offered of this. 



Dr. Spilhaus observed that very near the Equator typhoons had been 

 noted to rotate in the wrong direction for the hemisphere concerned. 

 Major Barney agreed that this was also the case in his experience in the 

 North Pacific. 



The question of thunder and lightning in typhoons was raised by 

 Mr. Hutchings, and Major Barney replied that although thunder and light- 

 ning occured frequently, typhoons exhibited surprising changes in the 

 character and intensity of the accompanying electrical phenomena, 

 often in a very short time. Not much was known about these changes. 



HURRICANES ON THE WEST COAST OF MEXICO 

 By Ronald L. Ives, Indiana University 



A bstract 



Frequency, behaviour, magnitude, and trajectory of Mexican west- 

 coast hurricanes is here outlined, on the basis of information available 

 up to 1948 ; the known and suspected effects of these hurricanes are 

 discussed ; and the need for further study of these disturbances, both 

 along their trajectories and in areas extending many miles beyond them, 

 is noted. 



Introduction 



Tropical cyclones have been reported from most tropical and sub- 

 tropical sea areas, and from the lands immediately adjacent to them. 

 Detailed studies of those in the Bay of Bengal(l), the Australian coastal 

 areas(2), the China Coast (3), and the eastern Caribbean Sea(4) are 

 numerous, extensive, and, on the whole, quite dependable except for 

 obsolescence. 



In contrast, tropical cyclones on the west coast of Mexico are men- 

 tioned only in the more detailed climatic and meteorological works(5), 

 and, even in these, mention is usually brief and unsatisfactory, due in 

 large part to lack of information. 



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