TYPES. 



95 



TYPE XVI. WIND BLOWING CONTRARY TO ISOBARS. 



In this type the wind blows with considerable force in a direc- 

 tion directly opposed to that which the isobars would lead us to 

 expect. For instance in No. 34, it will be seen that an extensive 

 high pressure rests over the east coast, and the isobars are com- 

 paratively close together. The normal circulation with these 

 isobars would be fresh north to north-west winds, when, as a 

 matter of fact, strong southerly winds were blowing as far as 

 Sydney with a velocity of thirty miles per hour. Such conditions 

 are rather troublesome in forecasting ; fortunately they do not 

 come often, and the fact is not confined to southerly winds. The 

 general direction of the coast line is northerly bearing east a little, 

 a range of mountains from two to four thousand feet high 

 runs nearly paralled to it, and this local formation has a very 

 important effect on the circulation of the wind ; as in Chart 34 

 it seems to have more effect than the isobars, and probably the 

 grade was rapidly intensifying and had not been long enough in 

 existence to fully control the winds. It seems probable, so far as 

 this type has been studied, that we should find that when the 

 wind blows contrary to isobars, it does so because of some impulse 

 given to it before the new grade had time to control the circulation. 



TYPES 



or 

 AUSTRALIAN WEATHER) 



Wind aeainsf Isobars 

 it 



