Friday, 31 July 2009 - Monthly Climate Summary for South Australia - Product code IDCKGC23R0
Rainfall totals were near average in the west tending below to very much below average in parts, through central and eastern areas.
Rainfall totals were typically 5 to 15 mm, though Nonning, Blinman and Yardea all had totals exceeding 40 mm, with Yardea's total of 61.6 mm being the highest in the pastoral areas.
Buckleboo recorded it's wettest July in the 22 years of the record with 59.8 mm, beating the previous wettest in 1989.
Rainfall totals were generally above average or well above average across the agricultural areas, apart from some parts of the eastern districts ending up slightly below average. The above average rainfall totals tended to be in areas more exposed to what was a predominately west to southwest air-stream through the month which saw a stronger than usual Southern Ocean influence.
July rainfall averaged across the SA agricultural areas has been the wettest since July 1996, and was 26% above the average.
Rainfall totals were generally in 60 to 100 mm range, tending to 30 to 50 mm in the Murray Valley and the Riverland. Higher totals were recorded generally exceeding 100 mm on Kangaroo Island, and the Lower Southeast and the Adelaide plains, with totals in the Mount Lofty ranges generally being 150 to 200 mm, with many locations exceeding 200 mm, the highest being Uraidla with 256.6 mm.
Port Vincent on the Yorke Peninsula had it's wettest July in the 108 year record with 104.2 mm well exceeding the previous july record of 93.0 mm in 1995. Warooka, also on the Yorke Peninsula, recorded it's highest daily July rainfall total of 40.2 mm in 24 hours. Many locations had totals in the top 10% of July totals in their records.
Across the longer term, rainfall for the growing season to date is generally near or above average across most of the agricultural districts, apart from the southeast. Some locations on the west coast of Eyre Peninsula are tracking in the wettest 10% of growing seasons on record, to the end of July.
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 July.
Longer term rainfall deficiencies continue across 2 to 10 year rainfall averages for the South Australian agricultural areas and the Murray Darling Basin, which has seen below average rainfall continue through this year ( See http://www.bom.gov.au/cgi-bin/silo/rain_maps.cgi ).
Some sites had their highest total July rainfall on record.
State-wide the monthly mean July temperature (the average of the maximum and minimum temperatures) was 1.1°C above the average for the South Australian agricultural areas, and 1.3°C above average for South Australia as a whole, looking at the July records since 1950.
Mean maximum temperatures for July were generally up to 1°C above average across the state, with no records evident.
In the Pastoral districts mean maximum temperatures ranged from 15.9°C at Yunta to 20.6°C at Marree. Mean maximum temperatures over the Agricultural districts ranged from 11.1°C at Mt Crawford in the Mount Lofty Ranges to 18.3°C at Port Augusta Aerodrome.
The highest maximum recorded during July was 28.3°C at Moomba Airport on the 21st of July. The lowest was 8.2°C at Mount Crawford on the 7th of July.
Mean minimum temperatures for July were generally between 1 to 2°C above average across the state, with much of the western agricultural district up to 2.5°C above average. Several locations in the western agricultural areas recorded their warmest July nights on record (see the table below), while Adelaide had it's warmest July nights since 1975.
Mean minimum temperatures in the pastoral areas ranged from 5.0°C at Yunta Airport to 7.9°C at Oodnadatta Airport. Over the agricultural districts mean monthly minimum temperatures ranged from 3.9°C at Yongala to 11.9°C on Neptune Island.
The lowest minimum temperature recorded during July was −4.7°C at Yunta in the North East Pastoral district on the 7th. Moomba Airport recorded the warmest overnight temperature with 17.1°C on the 22nd of July.See a map of mean maximum temperatures. See a map of maximum temperature anomalies.
Some sites had their highest July mean daily minimum temperature on record.See a map of mean minimum temperatures. See a map of minimum temperature anomalies.
|28.3°C at Moomba Airport on the 21st|
|Warmest days on average
Highest mean daily maximum temperature
|20.5°C at Marree Comparison|
|Coolest days on average|
Lowest mean daily maximum temperature
|11.1°C at Mount Crawford Fire Tower|
Lowest daily maximum temperature
|8.2°C at Mount Crawford Fire Tower on the 14th|
|−4.7°C at Yunta Airstrip on the 7th|
|Coolest nights on average|
Lowest mean daily minimum temperature
|3.9°C at Yongala|
|Warmest nights on average|
Highest mean daily minimum temperature
|11.9°C at Neptune Island|
Highest daily minimum temperature
|17.1°C at Moomba Airport on the 22nd|
Highest total rainfall
|256.6 mm at Uraidla|
|Highest wind gust||
96 km/h at Neptune Island on the 2nd|
96 km/h at Cape Willoughby on the 10th
|Record highest total July rainfall|
| Total rainfall
for July 2009 (mm)
| Previous highest
|Port Vincent||104.2||93.0||in 1995||108||46.9|
|Furner (Kennion Section 235)||170.6||143.2||in 2000||34||95.2|
|Record highest July mean daily minimum temperature|
Mean daily minimum
for July 2009 (°C)
|Streaky Bay||10.4||10.3||in 1946||82||8.4|
|Ceduna AMO||8.2||= 8.2||in 1963||68||5.7|
|Adelaide Airport||8.5||= 8.5||in 1993||54||7.0|
|Adelaide (Kent Town)||9.0||8.5||in 1995||32||7.4|
|Maitland||8.2||= 8.2||in 1974||29||6.9|
|Leigh Creek Airport||6.6||6.4||in 1996||25||4.7|
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 July 2009|
|Northwest (district 16)|
|Coober Pedy Airport||19.0||27.3||20th||7.1||3.8||16th||3.0|
|Far North (district 17)|
|Leigh Creek Airport||17.5||+1.0||24.9||21st||6.6||+1.9||1.2||24th||8.0||17.3||average||46%|
|Western Agricultural (district 18)|
|Port Augusta Aero||18.3||24.0||20th||6.7||0.2||24th||20.6|
|Streaky Bay||17.3||+0.8||21.6||20th||10.4||+2.0||5.4||23rd||116.2||61.2||very high||196%|
|Upper North (district 19)|
|Northeast (district 20)|
|Lower North (district 21)|
|Clare High School||12.9||18.3||20th||5.9||−0.6||24th||69.6|
|Port Pirie Aerodrome||16.9||21.7||20th||7.1||0.4||24th||35.3|
|Port Pirie Nyrstar Comparison||17.4||+1.0||22.0||21st||9.7||+2.0||4.0||23rd||52.4||34.0||high||154%|
|Yorke Peninsula (district 22A)|
|Kangaroo Island (district 22B)|
|Cape Willoughby||14.9||+0.7||18.0||20th||10.5||+0.8||7.8||14th||131.6||82.0||very high||160%|
|Adelaide Plains (district 23A)|
|Edinburgh RAAF||15.6||+0.3||20.1||20th||7.0||+1.0||−0.1||7th||88.0||53.4||very high||165%|
|Parafield Airport||15.7||+0.7||20.8||20th||7.6||+1.3||0.1||7th||109.0||59.2||very high||184%|
|County Light (district 23B)|
|Mount Lofty Ranges (district 23°C)|
|Hindmarsh Island AWS||15.6||21.2||20th||8.4||2.5||9th||66.2|
|Kuitpo Forest Reserve||12.5||17.7||20th||7.4||3.8||7th||102.6|
|Mount Barker||13.8||+1.0||18.5||20th||6.2||+1.7||0.0||6th||195.4||106.1||very high||184%|
|Mount Crawford Fire Tower||11.1||16.6||20th||6.4||2.1||6th||180.2|
|Upper Murray Valley (district 24A)|
|Loxton Research Centre||16.6||+0.9||23.3||20th||5.1||+1.3||−2.8||8th||25.0||28.5||average||88%|
|Lower Murray Valley (district 24B)|
|Murray Bridge Comparison||16.6||+0.4||22.2||21st||6.0||+0.5||0.2||9th||54.4||35.3||high||154%|
|Murray Mallee (district 25A)|
|Upper Southeast (district 25B)|
|Lower Southeast (district 26)|
|Mount Gambier Aero||13.4||+0.3||15.9||21st||5.9||+0.8||−0.5||17th||150.8||99.5||very high||152%|
|Robe Comparison||14.0||+0.4||15.8||28th||9.2||+1.1||4.8||7th||171.2||104.5||very high||164%|
This statement has been prepared based on information available at 3 pm on Friday 31 July 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.