TYPES. 



73 



thunderstorms is the narrowness of the col 1 and somewhat con- 

 gested state of isobars in the high pressures west and east of it, 

 resulting in opposing winds. Those of the tropical tongues are 

 hot and charged with moisture, while those of the ,\ depressions 

 are strong and dry. This type is met with during the monsoonal 

 season. The rains resulting from this feature are not generally 

 heavy, and though thunderstorms may be experienced over exten- 

 sive areas of Queensland, New South Wales, and Northern 

 Territory, a number of them may occur without any rain falling. 



Chart No. 11, January 17th, 1893, shows an extended and 

 narrow tongue lying between two relatively high pressures, a \ 

 depression similarly situated also exists in the south, this col or 

 area of low pressure separating these two depressions is very 

 small, and opposing currents of wind are noted there as blowing 

 within close limits. Thunderstorms were occurring or had 

 occurred in Northern Territory generally, over a great part of 

 Queensland and in central parts of New South Wales, the rains 

 upon this occasion, as is often the case, were not heavy, though 

 they fell over an extensive and generally unfavoured area. 



TYPES 

 or 



AUSTRALIAN WEATHER 

 NM 



1 For explanation of this term see p. 80. 



