Monday, 2 August 2010 - Monthly Climate Summary for South Australia - Product code IDCKGC23R0
July rainfall totals were generally average to above average in the Pastoral districts. Totals were typically within 10 to 30mm, apart from Moomba Airport and Marree Comparison with 60mm and 52.6mm respectively.
Rainfall totals were generally below average across the Agricultural districts, apart from some areas where totals were close to average, and the west which had above average rainfall.
Rainfall totals ranged from about 25 to 50mm in the Western Agricultural District and Yorke Peninsula, tending to 20 to 40mm in the Upper and Lower North districts, the Murray Valley, Murray Mallee and Upper Southeast District. Totals ranged from 30 to 50mm across the Adelaide Plains and County Light districts, increasing to about 40 to 90mm in the Mount Lofty Ranges, Kangaroo Island and Lower Southeast.
Winter rainfall totals have been below average across most of the southeast this winter so far. Winter totals have been close to average elsewhere, apart from the northeast corner and the far west coast where winter rainfall has been above average.
This year so far, rainfall totals have been above average across the northeast of South Australia. Across most of the Agricultural districts, rainfall this year to date has been close to average, with pockets of below average, and pockets of above average rainfall.
See a map of rainfall deciles.
State-wide the monthly mean temperature (the average of the maximum and minimum temperatures) for July was close to average (0.2°C below the long-term average of 11.6°C for South Australia).
Mean maximum temperatures were up to 1°C below average in the Pastoral districts, and ranged from 14.5°C at Yunta Airstrip to 18.8°C at Marree Comparison. The highest recorded maximum temperature in the Pastoral districts for July was 27.0°C at Marla Police Station on the 29th. The lowest was 10.6°C at Nonning on the 18th.
Mean maximum temperatures over the Agricultural districts were generally within 1°C of the long-term mean for July. The Western Agricultural District tended cooler than average, with maximums at Nullarbor 1.4°C below its long-term mean for July. Mean maximum temperatures ranged from 9.6°C at Mount Lofty to 16.9°C at Nullarbor and Port Augusta Aero. The highest maximum recorded during July was 23.1°C at Nullarbor on the 17th of July. The lowest was 7.0°C at Mount Lofty on the 1st of July.
Mean maximum temperatures have been average to below average this winter so far, apart from Kangaroo Island where maximum temperatures have been warmer than average.
This year to date, mean maximum temperatures have been above average across the south and west of the state and average to below average in the northeast.
Mean minimum temperatures were predominantly below average across South Australia in July. Minimum temperatures were up to 1 °C below average across the south, increasing up to 2 °C below average in parts of the southeast. Minimums were generally within 1 °C of the long-term mean elsewhere.
Mean minimum temperatures in the Pastoral districts ranged from 1.7°C at Gluepot Reserve to 7.1°C at Moomba Airport. The lowest minimum temperature recorded during July in the Pastorals was -3.7°C at Ernabella (Pukatja) in the Northwest Pastoral district on the 2nd. Moomba Airport recorded the warmest overnight temperature with 16.8°C on the 30th of July.
Over the Agricultural districts mean monthly minimum temperatures ranged from 1.1°C at Yongala to 12.1°C at Neptune Island. The lowest minimum temperature recorded in the Agricultural districts was -4.5°C at Renmark Aero in the Upper Murray Valley on the 6th of July. The highest minimum temperature was 13.2°C at Neptune Island on the 13th.
Mean minimum temperatures have been below average across the southeast of South Australia this winter so far and generally close to average elsewhere. In contrast, mean minimum temperatures have generally been above average across South Australia this year so far.
Strong to gale force N-NE winds ahead of a frontal system occurred across a broad area of the state. Winds then shifted NW and only very gradually eased following the passage of the front. Duration of event was about 2-4 hours at many locations. Numerous reports of trees blown over and damaged property. Numerous severe winds gusts and severe mean winds were recorded across the state. Some of the strongest wind strengths recorded included: Cape Willoughby recorded a NNW gust to 126 km/h, Cleve recorded a N wind gust to 119 km/h and Mount Crawford recorded a NNE gust to 111 km/h.
A cold front tracked across the southern agricultural area during the morning. In the unstable air mass showers and isolated thunderstorms developed. A tornado was reported to cause damage SE of Mallala in the states Mid North.
A fairly slow moving cluster of heavy convective showers tracked northeast across the Adelaide metro area in the early evening. Rain caused local flash flooding in southern suburbs. Marion recorded 33 mm in 1 hour from 5:50 pm to 6:50 pm.
|Extremes in July 2010|
|Hottest day||27.0 °C at Marla Police Station on the 29th|
|Warmest days on average||18.8 °C at Marree Comparison|
|Coolest days on average||9.6 °C at Mount Lofty|
|Coldest day||7.0 °C at Mount Lofty on the 1st|
|Coldest night||-4.5 °C at Renmark Aero on the 6th|
|Coolest nights on average||1.1 °C at Yongala|
|Warmest nights on average||12.1 °C at Neptune Island|
|Warmest night||16.8 °C at Moomba Airport on the 30th|
|Wettest overall||145.9 mm at Flinders Chase (Rocky River)|
|Highest wind gust||126 km/h at Cape Willoughby on the 10th|
|Summary statistics for July 2010|
|Northwest (district 16)|
|Coober Pedy Airport||17.5||22.8||12th||5.8||0.7||1st||10.6|
|Roxby Downs (Olympic Dam Aerodrome)||17.0||21.8||29th||3.4||-2.0||8th||6.0|
|Far North (district 17)|
|Leigh Creek Airport||16.2||-0.4||20.7||27th||4.7||-0.1||-0.5||7th||27.0||17.7||high||153%|
|Marree Comparison||18.8||-0.3||23.4||29th||5.6||+0.7||0.4||7th||52.6||10.1||v high||521%|
|Western Agricultural (district 18)|
|Coulta (Coles Point)||15.4||17.3||17th||6.5||2.8||2nd||48.6|
|North Shields (Port Lincoln AWS)||15.9||18.3||29th||6.2||2.7||5th||61.6|
|Port Augusta Aero||16.9||22.0||30th||3.7||-1.2||7th||21.0|
|Upper North (district 19)|
|Northeast (district 20)|
|Gluepot Reserve (Gluepot)||16.4||23.3||30th||1.7||-3.6||9th||21.6|
|Lower North (district 21)|
|Clare High School||12.8||16.0||28th||3.0||-2.5||6th||37.2|
|Port Pirie Aerodrome||16.2||20.4||30th||3.9||-0.6||6th||16.8|
|Port Pirie Nyrstar Comparison||16.8||+0.4||21.1||30th||6.8||-0.9||3.0||3rd||17.4||33.8||low||51%|
|Snowtown (Rayville Park)||15.4||18.9||28th||3.1||-1.2||3rd||24.8|
|Yorke Peninsula (district 22A)|
|Kangaroo Island (district 22B)|
|Adelaide Plains (district 23A)|
|Adelaide (Kent Town)||15.4||+0.1||18.7||28th||6.8||-0.7||2.3||2nd||59.8||75.7||low||79%|
|County Light (district 23B)|
|Rosedale (Turretfield Research Centre)||14.8||+0.1||18.7||13th||4.1||-1.5||-0.5||6th||37.7||58.9||low||64%|
|Mount Lofty Ranges (district 23C)|
|Hindmarsh Island AWS||15.3||18.6||30th||7.3||3.0||5th||25.4|
|Kuitpo Forest Reserve||12.4||16.1||28th||6.3||3.3||5th||90.4|
|Mount Crawford (Mt Crawford AWS)||11.0||14.4||13th||5.6||3.1||1st||65.8|
|Parawa (Second Valley Forest AWS)||12.1||14.3||28th||6.9||4.0||4th||56.4|
|Victor Harbor (Encounter Bay)||15.5||18.2||30th||5.7||0.2||9th||68.4|
|Upper Murray Valley (district 24A)|
|Loxton Research Centre||15.5||-0.3||21.5||30th||2.6||-1.3||-3.9||6th||28.8||28.5||average||101%|
|Lower Murray Valley (district 24B)|
|Murray Bridge (Pallamana Aerodrome)||15.4||19.7||13th||3.5||-3.2||5th||24.0|
|Murray Bridge Comparison||16.5||+0.3||20.4||13th||4.1||-1.3||-1.2||5th||31.6||35.3||average||90%|
|Murray Mallee (district 25A)|
|Upper Southeast (district 25B)|
|Lameroo (Austin Plains)||14.6||18.9||30th||3.3||-0.9||6th||18.2|
|Lower Southeast (district 26)|
|Cape Jaffa (The Limestone)||14.2||16.2||30th||6.6||2.5||9th||56.4|
|Mount Gambier Aero||14.0||+0.9||17.0||30th||4.7||-0.5||-0.3||6th||90.4||99.4||average||91%|
A Monthly Climate Summary is prepared to list the main features of the weather in South Australia using the most timely and accurate information available on the date of publication; it will generally not be updated. Later information, including data that has had greater opportunity for quality control, will be presented in the Monthly Weather Review, usually published in the fourth week of the month.
This statement has been prepared based on information available at 9 am on Monday 2 August 2010. 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.