TYPES. 



85 



wrecks on this coast. For the most part these gales appear to be 

 partially spent cyclones, which come in from north-east or east, 

 and travel down the coast until they begin to recurve to the 

 eastward. 



The warning of their coming is usually very short ; it consists 

 of a sudden increase in the sea on some northern part of the coast 

 with wind from east to south, and falling barometers, while the 

 high pressure over Victoria and South Australia becomes inten- 

 sified and progresses into the Tasman Sea. The south-east circula- 

 tion about this anticyclone increases in force with the increasing 

 barometric grade, and also by the wind circulation about the 

 cyclone, and the effect of the two causes acting together is to 

 produce a most serious gale. Rarely, these storms originate in 

 a nionsoonal depression somewhere over South Australia, which 

 travelling eastward intensifies on the east coast. Heavy rain is 

 a marked feature of these storms, but it is confined to the coast, 

 and rarely if ever extends inland. 



The storm selected to illustrate this type was a very severe one, 

 and began on September 23rd, 1892, about 6 p.m. The barometric 

 conditions antecedent to it are shown in Chart 25 ; the main 



TYPES 



or 



AUSTRALIAN WEATHER 

 N25 



