Wednesday, 30 September 2009 - Monthly Climate Summary for South Australia - Product code IDCKGC13R0
Rainfall totals in eastern parts of the pastoral areas were average whilst over the western areas they were all above average but some locations in the central northern parts of the state recorded very much above average totals.
Rainfall totals were predominantly less than 10 mm in eastern pastoral areas. In the remainder of the pastoral districts rainfall totals were generally between 10 mm and 30 mm, with Nonning's total of 53.3 mm being the highest.
Rainfall totals were average to above average across most of the agricultural areas, with some locations in the south-eastern districts of the state receiving very much above average.
Over the northern parts of the agricultural districts rainfall totals were between 10 and 25 mm gradually increasing to more than 150 mm in the southern and higher elevated parts of the state. The highest total being 161.0 mm at the Heathfield Works Depot, in the Mount Lofty Ranges.
Across the longer term, rainfall for the growing season to date (April to September) is generally average or above average across all of the agricultural districts.
The year to date rainfall is generally near average across most agricultural districts apart from in the east, while the remainder of the state is generally below average to the end of September.
Looking at the September records since 1950; state-wide the monthly mean September temperature (the average of the maximum and minimum temperatures) was 1.0°C above the average for the South Australian agricultural areas. For South Australia as a whole the monthly mean September 2009 temperature is the coolest since 2005.
The mean maximum temperatures for September graded from near average in the Lower Southeast, Kangaroo Island and western Eyre Peninsula districts up to 2°C above average in the north of the state.
In the Pastoral districts mean maximum temperatures ranged from 21.7°C at the Yunta Airstrip to 27.5°C at the Moomba Airport. Mean maximum temperatures over the Agricultural districts ranged from 13.2°C at Mount Lofty in the Mount Lofty Ranges to 23.8°C at Port Augusta.
The highest maximum recorded during September was 38.3°C at Oodnadatta Airport on the 16th of September. The lowest was 9.2°C at Mount Crawford on the 25th of September.
Similar to the maximum temperatures, the mean minimum temperatures for September were near average to 1°C above average in agricultural areas of the state and as high as up to 3°C above in the north.
Mean minimum temperatures in the pastoral areas ranged from 7.3°C at the Yunta Airstrip to 13.4°C at the Oodnadatta Airport. Over the agricultural districts mean monthly minimum temperatures ranged from 3.7°C at Yongala to 12.2°C on Neptune Island.
The lowest minimum temperature recorded during September was −2.3°C at Yongala in the Upper North Pastoral district on the 14th. Arkaroola recorded the warmest overnight temperature with 23.4°C on the 12th of September.
Some sites had their coldest September day (lowest maximum temperature) on record.See a map of mean maximum temperatures. See a map of maximum temperature anomalies.
Some sites had their warmest September night (highest daily minimum temperature) on record.See a map of mean minimum temperatures. See a map of minimum temperature anomalies.
Associated with a deepening low pressure cell that developed northwest of Ceduna and travelled eastwards during the 21st and 22nd of September, gale force winds (63km/h) were recorded over large areas of the state's western and northern districts resulting in widespread duststorms which eventually blanketed 2 of Australia's major cities, Sydney and Brisbane, and travelled as far north as the Gulf of Carpentaria.
Also during these days wind gusts of greater than 90km/h were recorded at Coober Pedy, Tarcoola and Woomera to name a few. he highest gust during the month was 117km/h at Cape Willoughby on the 11th and Oodnadatta Airport on the 19th.
With the development of a low pressure system on the 21st many thunderstorms were recorded across most of the agricultural districts. Associated with these thunderstorms many incidents of hail showers were observed with hailstones measuring up to 40 mm in diameter mainly on the Eyre Peninsula. Crop damage resulted from these hail showers but mostly confined to some areas of the Western Agricultural district.
|38.3°C at Oodnadatta Airport on the 16th|
|Warmest days on average|
Highest mean daily maximum temperature
27.5°C at Marla Police Station|
27.5°C at Moomba Airport
|Coolest days on average|
Lowest mean daily maximum temperature
|14.5°C at Parawa (Second Valley Forest AWS)|
Lowest daily maximum temperature
|9.2°C at Mount Crawford Fire Tower on the 25th|
|−2.3°C at Yongala on the 14th|
|Coolest nights on average|
Lowest mean daily minimum temperature
|3.7°C at Yongala|
|Warmest nights on average|
Highest mean daily minimum temperature
|13.4°C at Oodnadatta Airport|
Highest daily minimum temperature
|23.4°C at Arkaroola on the 12th|
Highest total rainfall
|161.0 mm at Heathfield Works Depot|
|Highest wind gust||
117 km/h at Cape Willoughby on the 11th|
117 km/h at Oodnadatta Airport on the 19th
|Record lowest September daily maximum temperature|
Lowest daily maximum
in September 2009 (°C)
|Kimba||10.5||on the 22nd||10.8||on the 4th in 1979||42||20.3|
|Record highest September daily minimum temperature|
Highest daily minimum
in September 2009 (°C)
|Hawker||22.9||on the 12th||21.0||on the 23rd in 1988||36||6.7|
In this table, key sites have been highlighted to make them easier to find. This table is very wide and may not fit if printed.
|Summary statistics for September 2009|
|Northwest (district 16)|
|Coober Pedy Airport||25.4||37.8||12th||11.5||5.2||4th||16.4|
|Marla Police Station||27.5||+0.6||37.3||16th||12.4||+1.7||4.6||9th||22.0||9.5||high||232%|
|Far North (district 17)|
|Leigh Creek Airport||23.9||+0.7||32.9||12th||10.1||+0.8||3.6||5th||25.6||15.8||high||162%|
|Oodnadatta Airport||27.4||+0.9||38.3||16th||13.4||+2.0||6.0||5th||40.6||9.6||very high||423%|
|Western Agricultural (district 18)|
|Port Augusta Aero||23.8||35.7||12th||9.3||2.7||5th||20.0|
|Upper North (district 19)|
|Northeast (district 20)|
|Lower North (district 21)|
|Clare High School||17.1||28.4||12th||6.1||0.2||14th||97.2|
|Port Pirie Aerodrome||22.0||33.1||12th||7.8||1.8||9th||47.7|
|Port Pirie Nyrstar Comparison||22.1||+0.7||32.0||12th||10.7||+0.9||6.0||9th||59.9||35.5||high||169%|
|Yorke Peninsula (district 22A)|
|Kangaroo Island (district 22B)|
|Adelaide Plains (district 23A)|
|County Light (district 23B)|
|Mount Lofty Ranges (district 23°C)|
|Hindmarsh Island AWS||18.5||28.5||12th||9.2||3.1||15th||67.4|
|Kuitpo Forest Reserve||16.0||26.2||12th||8.2||3.2||26th||89.0|
|Mount Crawford Fire Tower||14.8||25.8||12th||7.5||2.5||26th||101.2|
|Upper Murray Valley (district 24A)|
|Loxton Research Centre||21.5||+0.8||34.8||12th||7.9||+1.6||−0.3||10th||37.0||26.1||high||142%|
|Lower Murray Valley (district 24B)|
|Murray Bridge Comparison||20.6||+0.8||33.7||12th||7.5||+0.3||1.6||15th||61.1||36.4||high||168%|
|Murray Mallee (district 25A)|
|Upper Southeast (district 25B)|
|Lower Southeast (district 26)|
|Mount Gambier Aero||16.2||+0.3||26.3||12th||7.1||+0.9||3.3||14th||111.6||72.9||very high||153%|
This statement has been prepared based on information available at 1 pm on Wednesday 30 September 2009. Some checks have been made on the data, but it is possible that results will change as new information becomes available.
Averages are long-term means based on observations from
all available years of record, which vary widely from site to site.
They are not shown for sites with less than 20 years of record, as they cannot then be calculated reliably.
The median is sometimes more representative than the mean of long-term average rain.
The Rank indicates how rainfall this time compares with the climate record for the site,
based on the
(very low rainfall is in decile 1, low in decile 2 or 3,
average in decile 4 to 7, high in decile 8 or 9
and very high is in decile 10).
The Fraction of average shows how much rain has fallen this time as a percentage of the long-term mean.