TYPES. 



89 



TYPES 



AUSTRALIAN WEATHER 



N28 

 MAY Z^ ! 



29-9 500 301 



strength covering the southern colonies of South Australia and 

 Victoria, and the greater part of New South Wales ; its isobars 

 are unusually symmetrical and its rain influence the most exten- 

 sive we have on rpcord. During the 29th and 30th rain continued 

 to fall over considerable areas, although on the 30th the depression 

 filled up and the storm was displaced by the high pressure coming 

 on from the west. 



TYPE XIII. WESTERLY WINDS. 



The Winter anticyclone (See Chart 36) is much nore extensive 

 than the Summer one, and its grades are steeper and circulation 

 stronger, while its latitude is further north, often up to 30 S.; 

 hence the circulation on its southern side, unlike the Summer one, 

 affects the mainland of Australia and gives us our westerly winds. 

 And just as the trade wind intensities its northern circulation by 

 adding force thereto, so the brave west winds of the southern 

 ocean follow the general move of the weather systems northwards, 

 and thus add force to the westerly circulation of the anticyclone, 

 and its greater dimensions increase the size of the A depression, 

 so much that it no longer has the sharply defined change from 



