TYPES OF AUSTRALIAN WEATHER. 537 
At 9 a.m. on the 24th, (Chart 26) the cyclone was still in an 
active state, but it had passed to the south of Sydney and was 
receding fromthe coast; the barometers were rising rapidly on shore, 
and before noon a light northerly wind was blowing. On the 25th 
September, the day following the gale, the weather everywhere 
was generally fine, while all that remained of the energetic high 
and low pressure systems were parallel isobars lying over the 
southern areas of Australia with very shallow gradients. This 
gale was very destructive and did much damage to property in 
Sydney ; in some instances houses were unroofed, and the wind 
and sea on the coast were very heavy. 
TYPE XII.—DEVELOPMENT OF A CYCLONE FROM A A DEPRESSION. 
The distinction between a A depression and a monsoonal low 
byte is not by any means well defined, and it is possible that 
this should be taken as a variation of Type 3; there are however, _ 
marked differences, not only in the shape of the isobars, but also 
i the wind ; and the most decided distinction is perhaps the 
easterly wind circulating round the southern part of the monsoonal 
low ala and the northerly and southerly winds about the 4 ; 
= M some cases, as in the one selected, the wind circulation is 
res northerly, southerly and easterly winds being present, and 
o Pies their want of energy tend to throw the forecaster off 
ie ao The season is, however, some guide, as these storms 
Frequent from September to April. 
aaa of influence is very extensive, as may be noted in 
mal a : . ich shows rain over half Australia as the apparent 
ee wey — Most of these storms take a direct easteely 
Maite. i; a South Wales and Victoria or earongh _ 
tee Ga imes pee move to — the Polar winds — 
ies ditions, aanee feature intensifies all the astm and = 
Soca a e wae in all these storms are violent, and in 
structive, 
The : 
189 One selected for illustration appeared first on 27th May, 
3, : " 
' (Chart 27). At 9 a.m. on that day, a dormant and irregular 
