Tuesday, 1 June 2010 - Monthly Climate Summary for South Australia - Product code IDCKGC23R0
South Australia in May 2010
A warmer and wetter than average month for most.
- Above average rainfall over most parts with pockets of below average rainfall in the southeast.
- Warmer than average maximums in parts of the west and in the southeast, close to average elsewhere.
- Warmer than average maximums across the south for the year so far to the end of May.
Rainfall values were above average across central, western and northern parts of the State this May, whilst they were below average in parts of the southeast and in isolated pockets through central parts.
So far this year, rainfall totals have been average to greater than average across most of the State, with totals well above average in the northeast corner. Some isolated pockets of below average rainfall are evident over Kangaroo Island, on the southeast coast and in the Northwest Pastoral District. Year to date rainfall totals are between 50mm and 200mm across most of the State. In the northeast totals exceed 200mm, due to heavy rainfall in February and March associated with the low pressure system approaching from the Northern Territory.
Most rainfall totals recorded in the pastoral districts were average to above average, and generally ranged between 20 and 30mm. The highest monthly total of 56.6mm was recorded at Yardea.
Much of May saw persistent high pressure systems over southern Australia and the Tasman Sea. On the 23rd, a developing low pressure system moved into the Great Australian Bight, with an associated surface trough extending across the west of the State. This low generated heavy showers, areas of rain and thunderstorms over South Australian agricultural areas on the 24th. Point Victoria on the Yorke Peninsula experienced an isolated heavy fall (50mm) in the strong, localised convective activity in the area, with Port Victoria setting a new daily rainfall record for May as a result. Caliph also set a new daily rainfall record with this activity. Overall, rainfall over the agricultural districts was generally average to above average with a few stations in the southeast recording below average rainfall. Rainfall totals ranged from about 20 to 30mm over the Northeast District, 30 to 70mm in the Western Agricultural, West Central, Upper North, Murray Valley, Murray Mallee and Upper and Lower Southeast districts, and 50 to 130mm over the Lower North and East Central districts. The highest total of 133.6mm was recorded at Crafers (Mt Lofty).Some sites had their highest total May rainfall on record. Some sites had their highest total May rainfall for at least 25 years. Some sites had their highest May daily rainfall on record. See a map of rainfall deciles.
Mean maximum temperatures were mixed across South Australia in May and generally within 1°C of the long-term mean. In the southeast, anomalies were close to 1°C warmer. The mean maximum temperature at Mount Barker was 1.8°C warmer than its long-term mean.
Over the pastoral districts, mean maximum temperatures ranged from 19.1°C at Yunta Airstrip to 23.8°C at Moomba Airport. The highest recorded maximum temperature in the pastoral districts for May was 31.3°C at Moomba Airport on the 3rd of the month, with the lowest being 13.1°C at Coober Pedy Airport on the 15th.
Over the agricultural districts mean maximum temperatures ranged from 13.8°C at Mount Lofty to 21.8°C at Ceduna AMO. The highest recorded daily maximum temperature for May in the agricultural areas was 30.4°C at Ceduna AMO on the 3rd of the month, with the lowest 9.9°C at Mount Lofty on the 12th.
Mean maximum temperatures have been above average across most of South Australia this year to date, apart from the northeast corner where temperatures grade from average to below. Across southern parts, these maximum temperatures were generally between 1°C and 2°C warmer than the long-term average for the January to May period.
Some sites have recorded their warmest mean maximum temperatures for the January to May period. Adelaide (Kent Town) recorded a mean maximum temperature of 26.9°C which equals the previous record set in 2007. Mount Barker recorded a mean maximum temperature of 25.8°C which just exceeds the previous record of 25.6°C set in 2007. Ceduna AMO recorded a mean maximum temperature of 27.3°C, which just exceeds the previous record of 27.1°C set in 2001. Rosedale (Turretfield Research Centre) recorded a mean maximum temperature of 27.5°C, which equals the previous record of set in 2001. Eudunda recorded a mean maximum of 26.2°C, exceeding its previous record January to May mean maximum of 26.0°C set in 2001. Loxton Research Centre recorded a mean maximum temperature of 28.2°C, which equals the previous record set in 2007.
Mean monthly minimum temperatures were mixed across the State in May 2010, and generally within 1°C of the long-term mean.
In the pastoral districts these ranged from 5.8°C at Yunta Airstrip to 10.2°C at Coober Pedy Airport. The lowest recorded daily minimum temperature for May in the pastoral districts was -2.5°C at Gluepot Reserve on the 15th of the month, the warmest being 16.8°C at Oodnadatta Airport on the 23rd.
Across the agricultural areas the mean minimum temperatures this month ranged from 3.3°C at Yongala to 14.4°C at Neptune Island in the Western Agricultural. The lowest recorded daily minimum temperature for May was -3.0°C at Yongala on the 14th, whilst the warmest minimum was 17.0°C at Streaky Bay on the 4th.
Mean minimum temperatures have also been warmer than normal across South Australia this year so far, with temperatures generally between 1°C and 2°C warmer in the southwest and close to 1°C warmer elsewhere.
|Extremes in May 2010|
|Hottest day||31.3 °C at Moomba Airport on the 3rd|
|Warmest days on average||23.8 °C at Moomba Airport|
|Coolest days on average||13.8 °C at Mount Lofty|
|Coldest day||9.9 °C at Mount Lofty on the 12th|
|Coldest night||-3.0 °C at Yongala on the 14th|
|Coolest nights on average||3.3 °C at Yongala|
|Warmest nights on average||14.4 °C at Neptune Island|
|Warmest night||17.0 °C at Streaky Bay on the 4th|
|Wettest overall||133.6 mm at Crafers (Mt Lofty)|
|Highest wind gust||107 km/h at Neptune Island on the 29th|
|Record highest May daily rainfall|
Highest daily rainfall
in May 2010 (mm)
|Port Victoria||50.0||on the 25th||46.7||on the 13th in 1884||125|
|Caliph||47.4||on the 25th||18.8||on the 24th in 2003||36|
|Record highest total May rainfall|
for May 2010 (mm)
|Highest total May rainfall for at least 25 years|
for May 2010 (mm)
Most recent higher
|Coober Pedy||49.0||86.8||in 1979||31||13.5|
|Summary statistics for May 2010|
|Northwest (district 16)|
|Coober Pedy Airport||21.2||27.8||3rd||10.2||5.2||31st||25.0|
|Marla Police Station||22.9||-0.3||29.3||23rd||8.9||-0.3||1.7||31st||8.6||12.5||average||69%|
|Roxby Downs (Olympic Dam Aerodrome)||20.8||26.9||3rd||9.4||1.9||14th||14.6|
|Far North (district 17)|
|Leigh Creek Airport||20.2||-0.9||26.7||2nd||8.9||+0.1||4.3||14th||27.0||15.7||average||172%|
|Western Agricultural (district 18)|
|Coulta (Coles Point)||19.0||22.9||22nd||9.0||0.0||12th||41.4|
|North Shields (Port Lincoln AWS)||20.2||27.9||1st||9.5||5.9||13th||40.2|
|Port Augusta Aero||21.1||28.8||3rd||8.7||1.0||14th||47.4|
|Whyalla Aero||20.2||-0.4||28.5||3rd||8.9||+0.1||1.5||14th||51.4||23.3||v high||221%|
|Upper North (district 19)|
|Northeast (district 20)|
|Gluepot Reserve (Gluepot)||20.9||26.8||1st||6.0||-2.5||15th||26.3|
|Lower North (district 21)|
|Clare High School||17.5||24.4||3rd||5.8||-1.0||15th||104.8|
|Port Pirie Aerodrome||20.6||27.1||3rd||8.6||1.3||14th||52.3|
|Port Pirie Nyrstar Comparison||20.8||+0.4||27.0||3rd||11.2||+0.5||6.0||12th||67.4||38.2||high||176%|
|Snowtown (Rayville Park)||20.2||26.7||3rd||7.2||0.7||15th||74.2|
|Yorke Peninsula (district 22A)|
|Kangaroo Island (district 22B)|
|Adelaide Plains (district 23A)|
|Adelaide (Kent Town)||19.8||+0.8||26.3||3rd||10.5||+0.3||4.3||15th||56.8||60.0||average||95%|
|County Light (district 23B)|
|Rosedale (Turretfield Research Centre)||19.5||+0.8||27.6||3rd||7.9||-0.4||1.6||12th||59.5||52.8||average||113%|
|Mount Lofty Ranges (district 23C)|
|Hindmarsh Island AWS||19.2||25.9||3rd||9.8||3.9||15th||39.8|
|Kuitpo Forest Reserve||16.6||22.8||3rd||9.5||5.8||14th||81.0|
|Mount Crawford (Mt Crawford AWS)||15.6||22.3||3rd||8.9||5.8||13th||55.2|
|Parawa (Second Valley Forest AWS)||15.7||20.0||3rd||9.9||5.7||14th||80.6|
|Victor Harbor (Encounter Bay)||19.3||25.4||3rd||8.1||0.0||14th||54.1|
|Upper Murray Valley (district 24A)|
|Loxton Research Centre||20.3||+0.8||25.7||1st||5.9||-0.5||-1.2||15th||45.4||23.5||high||193%|
|Lower Murray Valley (district 24B)|
|Murray Bridge (Pallamana Aerodrome)||20.1||28.1||3rd||6.2||-1.5||15th||37.8|
|Murray Bridge Comparison||20.5||+0.9||27.4||1st||7.5||-0.5||1.1||15th||46.8||35.0||high||134%|
|Murray Mallee (district 25A)|
|Upper Southeast (district 25B)|
|Lameroo (Austin Plains)||19.2||25.6||3rd||7.0||1.7||22nd||30.4|
|Lower Southeast (district 26)|
|Cape Jaffa (The Limestone)||16.9||20.9||3rd||8.6||1.4||23rd||35.0|
|Mount Gambier Aero||16.6||+0.5||22.5||1st||6.9||-0.4||1.2||15th||47.8||70.7||low||68%|
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 8 am on Tuesday 1 June 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.