Wednesday, 30 September 2009 - Monthly Climate Summary for South Australia - Product code IDCKGC13R0

South Australia in September 2009
Gales, thunderstorms and hail - a very mixed month.

Summary

  • 40 mm hailstones damage crops on Eyre Peninsula.
  • Gale force winds generate dust storms over the north of the state which eventually blankets Sydney and Brisbane.
  • Rainfall totals for the month are near average across most of the agricultural areas. This pattern is also the case for the April to end of September rainfall totals, as representing the growing season rainfall to date.

Based on preliminary data

This statement was prepared before all data for the period were available. This may affect some of the statistics presented. In particular, maximum temperatures for the final day were not available, as the “accounting period” had not finished. Final values, which have had greater opportunity for data quality control, will be presented in the Monthly Weather Review, which is usually published during the fourth week of the month.

An archive of previous monthly summaries for South Australia is also available, as are summaries for other states and many other climate summaries and diagnostics.

Rainfall

Pastoral Districts

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.

Agricultural Districts

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.

See a map of total rainfall. See a map of rainfall deciles.

Temperature

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.

Maximum

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.

Minimum

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.

Wind

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.

Thunderstorms

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.

Further information

South Australian Regional Office
South Australian Climate Services Centre
Bureau of Meteorology
Phone (08) 8366 2600
Email climate.sa@bom.gov.au

Extremes

Hottest day
Highest temperature
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)
Coldest day
Lowest daily maximum temperature
9.2°C at Mount Crawford Fire Tower on the 25th
Coldest night
Lowest temperature
−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
Warmest night
Highest daily minimum temperature
23.4°C at Arkaroola on the 12th
Wettest overall
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

Records


Record lowest September daily maximum temperature
Lowest daily maximum
temperature
in September 2009 (°C)
Previous lowest
for September
Years of
record
Average for
September
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
temperature
in September 2009 (°C)
Previous highest
for September
Years of
record
Average for
September
Hawker 22.9 on the 12th 21.0 on the 23rd in 1988 36 6.7



Summaries

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
Maximum temperatures
for September
(°C)
Minimum temperatures
for September
(°C)
Rainfall
for September
(millimetres)
Mean for
September
2009
Diff
from
average
Highest for
September
2009
Mean for
September
2009
Diff
from
average
Lowest for
September
2009
Total for
September
2009
Average
for
September
Rank of
September
2009
Fraction of
September
average
Northwest (district 16)
Andamooka 25.3 +0.7 36.0 12th 11.5 +1.1 6.8 27th 16.8 12.9 high 130%
Coober Pedy Airport 25.4   37.8 12th 11.5   5.2 4th 16.4
Ernabella 26.3   33.9 16th 11.6   2.7 8th 26.8
Marla Police Station 27.5 +0.6 37.3 16th 12.4 +1.7 4.6 9th 22.0 9.5 high 232%
Nonning 22.1 +0.6 34.0 12th 7.7 +0.8 0.5 5th 53.3 24.7 high 216%
Roxby Downs     35.0 11th 11.0   4.7 5th 0
Tarcoola Aero 25.4   37.1 12th 9.9   1.3 5th 1.2
Woomera Aerodrome 24.0 +1.5 37.2 12th 10.9 +1.5 5.0 27th 12.4 14.9 average 83%
Far North (district 17)
Arkaroola 24.2 +0.9 33.0 16th 9.7 +1.7 3.0 5th 7.4 15.2 average 49%
Leigh Creek Airport 23.9 +0.7 32.9 12th 10.1 +0.8 3.6 5th 25.6 15.8 high 162%
Marree Aero 25.9   34.7 21st 11.1   5.6 1st 1.8
Marree Comparison 27.1 +1.4 35.5 16th 11.1 +1.3 5.7 5th 12.2 10.1 high 121%
Moomba Airport 27.5   36.6 21st 12.1   6.4 9th 2.2
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)
Ceduna AMO 22.3 +0.9 31.4 15th 8.6 +0.8 0.0 5th 30.2 27.8 average 109%
Cleve 20.0 +0.6 32.1 12th 9.5 +1.0 4.1 14th 59.6 42.3 high 141%
Cleve Aerodrome 20.0   32.1 12th 8.9   1.8 14th 52.0 36.3 high 143%
Coulta 17.7   25.8 29th 9.0   3.5 14th 59.6
Cummins Aero 18.5   26.2 15th 6.4   0.9 15th 82.4
Elliston 19.7 +0.5 28.0 29th 9.7 +0.3 3.5 14th 69.5 39.5 very high 176%
Kimba 20.1 −0.2 32.5 12th     4.0 14th 57.0 36.8 high 155%
Kyancutta 21.7 −0.1 31.3 12th 6.9 +0.6 0.4 14th 43.7 31.5 high 139%
Minnipa DPI 20.8   29.7 11th 8.1   2.6 14th 44.4
Neptune Island 16.8 +0.7 21.5 12th 12.2 +0.7 7.9 26th 57.8 45.0 high 128%
North Shields 18.6   26.2 12th 7.6   3.8 14th 47.2
Nullarbor 22.3 −0.2 32.1 15th 8.1 +0.2 2.3 8th 25.4 17.4 high 146%
Port Augusta Aero 23.8   35.7 12th 9.3   2.7 5th 20.0
Streaky Bay 20.8 +0.6 29.0 15th 10.6 +0.7 6.5 14th 50.5 35.4 high 143%
Whyalla Aero 22.2 +0.7 35.8 12th 8.9 +0.8 3.0 5th 21.6 27.3 average 79%
Wudinna Aero 21.7   31.6 11th 7.0   −0.7 14th 43.4
Upper North (district 19)
Hawker 22.1 +0.5 32.0 12th 8.8 +2.1 1.0 5th 31.0 27.7 high 112%
Yongala 18.6 +0.7 30.5 12th 3.7 −0.3 −2.3 14th 77.9 38.5 very high 202%
Northeast (district 20)
Gluepot Reserve 22.6   35.4 12th 7.9   −1.0 10th 27.4
Yunta Airstrip 21.7   33.7 12th 7.3   0.0 9th 14.2
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%
Snowtown 20.6   32.2 12th 5.0   −1.0 9th 74.6
Yorke Peninsula (district 22A)
Edithburgh 18.0   29.2 12th 7.8   2.4 14th 65.2
Kadina AWS 20.4   31.8 12th 6.5   −1.4 14th 77.0
Maitland 18.4 +0.5 29.5 12th 9.2 +0.8 4.0 28th 72.2 51.2 high 141%
Minlaton Aero 18.7   28.2 12th 8.3   2.0 28th 47.2
Stenhouse Bay 17.9   26.2 12th 10.1   6.3 10th 66.0
Warooka 17.9 +0.2 25.5 12th 9.0 +0.4 5.0 14th 58.0 45.7 high 127%
Kangaroo Island (district 22B)
Cape Borda 15.6   20.5 12th 10.0   7.1 14th 86.6
Cape Willoughby 17.0 +1.2 24.2 12th 10.8 +0.5 6.7 26th 56.2 56.1 average 100%
Kingscote Aero 17.9   25.6 12th 7.0   0.6 10th 65.2
Adelaide Plains (district 23A)
Adelaide 19.3 +0.3 30.9 12th 10.5 +0.8 4.8 10th 61.6 60.2 average 102%
Adelaide Airport 19.1 +0.9 29.6 12th 10.1 +1.2 3.6 15th 50.4 46.0 average 110%
Edinburgh RAAF 19.5 +0.7 32.6 12th 8.4 +0.4 1.9 15th 55.2 47.6 high 116%
Parafield Airport 19.7 +0.8 32.4 12th 8.9 +0.7 1.8 10th 61.0 43.9 high 139%
Roseworthy AWS 19.5   31.6 12th     0.9 14th 37.6
County Light (district 23B)
Nuriootpa Viticultural 17.4   28.5 12th 6.7   0.4 14th 64.0
Rosedale 18.7 +0.5 30.3 12th 6.5 −0.1 0.1 14th 79.6 53.4 high 149%
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 Barker 17.5 +1.0 27.7 12th 7.0 +1.2 0.5 10th 100.0 85.2 average 117%
Mount Crawford Fire Tower 14.8   25.8 12th 7.5   2.5 26th 101.2
Noarlunga 18.3   28.2 16th 10.5   6.1 18th 53.4
Parawa 14.5   22.1 12th 8.1   4.6 26th 98.6
Victor Harbor 18.4   26.6 12th 7.7   1.3 10th 80.6
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%
Renmark Aero 22.1   35.4 12th 7.5   −0.9 10th 35.2
Lower Murray Valley (district 24B)
Eudunda 17.5 +0.5 29.2 12th 6.7 +0.3 2.2 10th 80.1 48.6 very high 165%
Meningie 18.6 +0.5 25.9 12th 9.1 +0.9 3.4 10th 80.2 48.2 very high 166%
Murray Bridge 20.0   32.5 12th 5.6   −1.9 15th 63.8
Murray Bridge Comparison 20.6 +0.8 33.7 12th 7.5 +0.3 1.6 15th 61.1 36.4 high 168%
Strathalbyn Racecourse 18.7   29.0 12th 7.9   2.4 15th 89.6
Murray Mallee (district 25A)
Karoonda 20.2   34.1 12th 7.5   1.1 15th 73.5 35.4 very high 208%
Upper Southeast (district 25B)
Keith 18.6 +0.1 31.2 12th 7.6 +0.7 2.2 10th 58.0 51.0 average 114%
Keith 18.1   29.3 12th 5.9   0.5 15th 52.6
Lameroo 19.6   34.1 12th 5.9   0.8 15th 59.2
Lameroo Comparison 20.0 +0.7 34.0 12th 7.2 +1.2 2.3 14th 58.3 42.0 high 139%
Lower Southeast (district 26)
Cape Jaffa 15.9   21.4 12th 9.1   4.4 15th 81.0
Coonawarra 16.7 −0.1 26.8 12th 6.9 +0.5 2.1 15th 92.8 63.5 high 146%
Mount Gambier Aero 16.2 +0.3 26.3 12th 7.1 +0.9 3.3 14th 111.6 72.9 very high 153%
Naracoorte Aerodrome 17.0   27.2 12th 6.9   1.3 10th 78.8
Padthaway South 17.4   29.0 12th 7.4   1.9 10th 67.6
Robe Airfield 16.7   24.0 12th 8.5   2.3 15th 87.6
Robe Comparison 16.3 +0.6 20.2 12th 10.5 +1.3 5.7 10th 80.8 59.2 high 136%

Notes

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 decile ranking (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.

Based on preliminary data

This statement was prepared before all data for the period were available. This may affect some of the statistics presented. In particular, maximum temperatures for the final day were not available, as the “accounting period” had not finished. Final values, which have had greater opportunity for data quality control, will be presented in the Monthly Weather Review, which is usually published during the fourth week of the month.

Further information

South Australian Regional Office
South Australian Climate Services Centre
Bureau of Meteorology
Phone (08) 8366 2600
Email climate.sa@bom.gov.au