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MONTHLY CLIMATE SUMMARY - NSW REGIONAL OFFICE NSW September 2005: Above Average RainfallOverview: NSW experienced near average1 temperatures and above average1 rainfall this month. Some areas within the Central Tablelands and northen areas of the Southern Tablelands, covering part of the Warragamba Catchment Area, experienced record rainfall for September. For example, Goulburn and Tarlaga, on the far western border of the catchment, received their highest ever September rainfalls. See Table 1 below showing further site records. September 2005 Rainfall: The rainfall in NSW has been generally average to above average this September. Central NSW has received rainfalls in the Very Much Above Average category whilst coastal areas of the Hunter, Mid-North Coast and South Coast have had near normal rainfall this September (See Map 1). Widespread rain occurred on the 4th, 11th 17th and for four days ending on the 29th. The first three events were from cold fronts and associated low-pressure troughs passing over NSW. Rain at the end of the month was from a series of cold fronts that moved across the State in succession. July 2005 to September 2005 Rainfall: Most of the south-west half of the State received above to very much above average rainfall over the three months to the end of September. The remainder of the State received close to average rainfall except for parts of the lower Hunter, Mid North Coast and far north-east districts along the Queensland border which received below average rainfall for this period (See Map 2). September 2005 Temperatures. Monthly mean maximum temperatures were generally near normal for September. Parts of the northern coast and northern border districts were slightly above average while the far western of the state was cooler than normal by around one degree (See Map 3). Mean monthly minimum temperatures were mostly above average (See Map 4). The higher anomalies occurred mainly along the northern border area and in the Southern Tablelands. Parts of western NSW were below average by around one degree. Table 1 Monthly Record Rainfalls
A note about deciles: Deciles are used to give an element (in this case rainfall) a ranking. Deciles are calculated by arranging the totals in ascending order (from lowest to highest) then splitting them into 10 equal groups (thus the groups are called deciles). The first group would be in decile range one, the second group in decile range two, etc up to the highest annual totals (highest 10 per cent) being in decile range 10. 1Averages: These averages are based on the period 1961 to 1990 which is a convention of the World Meteorological Organisation.
Further
information:
Contact Perry Wiles 9296 1525 email: reqnsw@bom.gov.au For the latest rainfall and temperature maps, see: http://www.bom.gov.au/climate/austmaps/ |
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