74 



AUSTRALIAN W BATHER. 



On Chart No. 12, the following day, though a few storms were 

 recorded, shows a great diminution in number. The col has 

 widened and the monsoonal tongue has lost to some extent its 

 thundery characteristics, having widened at the end. The 

 accompanying barometric systems show no motion since the 

 previous day, but the high pressures have intensified. 



TYPES 



07 



AUSTRALIAN WEATHER 



NI2 

 JANUARY 16. ^ew 



TYPE VI. CYCLONIC THUNDERSTORMS. 



This also, like the preceding one, is allied to the tropical low 

 pressures, but in this case a defined cyclonic circulation develops 

 in the lower extension of the tongue without the usual intensifi- 

 cation of grades. From this source the thunderstorms radiate in 

 easterly and southerly directions, and at times, as in the instance 

 presented, a vast area is affected. 



Chart No. 13, December 12th, 1893. As on the previous set 

 the monsoonal tongue lies over much the same country, though 

 with its axis more east and west; the high pressure to the west is 

 very small, and the systems are somewhat fragmentary. 



