28o 



SOUTH AFRICAN METEOROLOGY. 



Weather Accompanying Pressure Types. 



Having now, approximately, arrived at the Type of Pres- 

 sure whidh will follow an existing one, it will be possible, to 

 a certain extent, to state what cloudy or fine weather should 

 accompany such type. As the result of analyzing the various 

 groups of Highs and Lows, the following table was prepared, 

 giving the approximate percentages of cloud w'hich should be 

 found in each district upon the advent of one of the Pressure 

 Types. 



The second table gives a working basis for everyday use, 

 based on the percentages. The symbols are : O, for 25 per cent, 

 of cloud or less, being Fine Weather ; S, for over 25 per cent. 

 Up to 50 per cent., representing cloud in places; and • for 50 

 per cent, of cloud or more, being cloudy and unsettled weather. 



Pressure Types; Percentages of Cloud which should be 

 present over each District. 



Summer. Highs without Lows. Total 



W SW C S SE FS N WT CT ET Days. 



4 3 7 19 57 19 75 i9 35 57 68 

 3 5 6 14 21 13 31 16 26 35 62 

 2 I 4 8 42 22 69 29 52 72 170 

 6 16 8 20 34 14 20 22 28 26 48 



5 5 5 5 28 15 38 30 ^z 43 , 40 



Type 

 W 

 E 

 S 



c 

 p 



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