1036 Agricultural Gazette of N.S. W. [Dec. 2, 1908. 



Meteorological Bureau, No. 4 Division, 

 New South Wales. 



r 



Weather Conditions during October, 1908. 



S. WILSON. 

 Divisional Officer. 



The month opened with an anticyfloiie with its centre to the south of 

 Tasmania — covering the eastern States, over which fine weather ruled 

 generally, excepting on the central coast of New South Wales, where the 

 rear isobars of a departing " low " were causing cloudy, showery, and s(jually 

 conditions. The heaviest falls were 174 points at Green Cape and IGG points 

 at Gabo. An antarctic depression was also shown on the southern shores of 

 West Australia, between the Leeuwin and Eucla, and resulted in cloudy, 

 showery weather and slight to rough seas. By the following twenty-four 

 hours a great change had occurred in the relative dimensions of the pressure 

 systems, the " high " over the eastern States being now very deflated and 

 occupying one-fourth of its former area, the "low" to the east had slightly 

 retrogressed, whilst the depression to the west had advanced 300 miles east- 

 ward. With this distribution, rough to high seas and fresh to strong winds 

 and cloudy or showery weather obtained on the coast soutli from Port 

 Macquarie. Over inland districts of the continent fine weather ruled for 

 the most part, but on the south-west coast of We.st Australia unsettled 

 conditions with rough sea had appeared. Between the 3rd and tl;e 9th, two 

 anticvclones and an extensive belt of low pressure over the southern distiicts 

 of the continent controlled the weather conditions. The high pressure, 

 which on the 1st and 2nd covered the south-eastern half of Queensland and 

 north-western districts of New South Whales, was represented by only one 

 isobar. By the 5th, however, the pressure had increased considerably over 

 the eastern States, the anticyclone now consisting of three isobai's. 



These barometric conditions were indicative of a slight I'etrogressive 

 movement. On the 6th and 7th, evidence of still further intensification was 

 shown on the isobaric charts, the centi'al reading at Brisbane reaching 

 30 "36 inches on the latter day. 



In the meantime the depression, which on the oth was rather energetic, 

 had moved eastward, but with daily diminishing pressure, until the 7th, 

 when it covered Victoria and Tasmania, but oidy contained two isobars. 

 The stagnation of the anticyclone, together with the j)roximity of the 

 advance isobars of the depression, i-esulted in a heat-wave which affected 

 various parts of eastern Australia. At Sydney, under the influence of a hot 

 north-west wind, the temperatui-e rose to 90"o degi'ees, which repi-esents the 

 highest since February 8th last, when 91-3 degrees was recorded. The 

 extreme temperatures over New South Wales occurred for the most part 

 on the 7th. 



