AUSTRALIAN WEATHER. 



is shown in full force in front of the anticyclone, which by the 

 way has lost none of its energy since the previous day ; the 

 depression is well off the coast and on its way to New Zealand. 

 This burster reached a velocity of forty-nine miles per hour, and 

 lasted thirty-five hours. 



TYPE XV. THE BLACK NORTH-EASTER. 



This is a somewhat uncommon but nevertheless well known 

 type of weather on the coast about Sydney. Its characteristics 

 are a very strong and persistent north-east gale, continuing day 

 and night for two or more days ; it has been known to last five 

 days and nights, and it ends with the advent of a southerly 

 burster. Its cause is found in an extensive col, the rear of one 

 anticyclone being at rest over this coast, while another lies over the 

 Australian Bight. If the grade is rather steep and the system 

 at rest for several days, then the north-east wind persists with 

 force proportionated to the grade, until the whole system moves 

 forward ; the southerly winds in the front of the approaching high 

 pressure then displace the north-easter and the storm is over. 



There have been no good examples of this type since weather 

 charts have been printed here. Chart 33 shows the necessary 

 forms of isobars, but the grade is not steep enough for a gale. 



