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Tuesday, 31 January 2012 - Monthly Climate Summary for South Australia - Product code IDCKGC13R0
January rainfall across South Australia was mostly average to above average, though several locations received very much above average monthly totals. See a map of rainfall deciles. The wettest periods for much of South Australia were between the 8th and 10th and between the 28th and 30th. Many locations recorded most of January's rainfall in the earlier period, as a low pressure system and trough located to the south of the State extended over western and central districts.
The highest January total rainfall in the State was observed at Melrose where 91.2 mm was recorded. The highest daily rainfall total observed during January was recorded at Wilmington where 69.6 mm of rain was recorded to 9 am on the 30th.
Rainfall for January 2012 was mostly average across areas of the Pastorals, though tending to above average in the Northeast and the Northwest districts. Rainfall totals of 20 to 40 mm were reported across the Northwest and Far North, while in the Northeast some locations recorded totals of more than 50 mm.
Rainfall totals over southern parts of the Eyre and Yorke Peninsulas, Flinders and Mount Lofty Ranges and Murray Valley districts was average to below average for January 2012. Rainfall totals generally ranged between 20 to 40mm, though several locations recorded totals in excess of 60 mm. Rainfall was generally near average across the Adelaide Plains, while across parts of the Southeast of the State rainfall was below tending to very below average, where totals ranged between 10 to 20mm.Some sites had their highest total January rainfall for at least 25 years. Some sites had their highest January daily rainfall on record.
The average temperature (the average of the daily maximum and daily minimum temperatures) for South Australia as a whole in January 2012 was 1.1 °C above than the long-term January average. The above average temperatures across the State are due mainly to an extended period of hot conditions in the last 2 weeks of January. In comparison, January 2011 was 2.7 °C warmer than average. Mean temperatures for January 2012 ranged from 19.2°C at Mount Lofty to 31.7°C at Oodnadatta Airport.
The area-averaged mean maximum temperature of 35.3°C was 0.6°C above the long-term January average for South Australia as a whole. January 2001 is the warmest January on record with a mean maximum temperature of 38.9°C.
Average January maximum temperatures were close to 2°C above average across most of the Northeast and Central parts of the State, and up to 3°C warmer than average in the Southeast of the State. See a map of maximum temperature anomalies. Average maximum temperatures for the month ranged from 23.4 °C at Neptune Island to 38.3°C at Oodnadatta Airport and Marree comparison in the Far North district.
The hottest day of the month for any location was recorded at Ceduna AMO on the 1st where the maximum temperature reached 46.2 °C. Mount Lofty had the coldest day on the 15th with a maximum of 15.0°C.
Average minimum temperatures were generally up to 2°C warmer than average across most of the State though tending to 3°C above average across parts of the Western Agricultural, Far North and Southeast districts. See a map of minimum temperature anomalies. Average minimum temperatures across the State ranged from 13.1°C at Mount Lofty to 24.9 °C at Oodnadatta Airport.
The coldest nights for many locations was between the 7th and 11th as a cold frontal system followed by a southwesterly airstream crossed the State. Robe Airfield had the coldest night, recorded on the 5th with a minimum temperature of 4.4 °C.
The warmest nights for many locations was around the 1st and 3rd and again during the last 2 weeks of January; both of these periods were associated with warm to hot east to northeasterly winds being directed over much of the State. Oodnadata Airport recorded the warmest night of the month on the 20th with a minimum of 31.1°C.Some sites had their coldest January day (lowest maximum temperature) on record. Some sites had their highest January mean daily maximum temperature for at least 25 years.
|Extremes in January 2012|
|Hottest day||46.2 °C at Ceduna AMO on the 1st|
|Warmest days on average||
38.3 °C at Marree Comparison|
38.3 °C at Oodnadatta Airport
|Coolest days on average||23.4 °C at Neptune Island|
|Coldest day||15.0 °C at Mount Lofty on the 8th|
|Coldest night||4.4 °C at Robe Airfield on the 5th|
|Coolest nights on average||13.1 °C at Mount Lofty|
|Warmest nights on average||24.9 °C at Oodnadatta Airport|
|Warmest night||31.1 °C at Oodnadatta Airport on the 20th|
|Warmest on average overall||31.7 °C at Oodnadatta Airport|
|Coolest on average overall||19.2 °C at Mount Lofty|
|Wettest overall||91.2 mm at Melrose|
|Wettest day||69.6 mm at Wilmington on the 30th|
|Highest wind gust||109 km/h at Woomera Aerodrome on the 29th|
|Record highest January daily rainfall|
Highest daily rainfall
in January 2012 (mm)
|Wilmington||69.6||on the 30th||67.6||on the 30th in 1974||131|
|Highest total January rainfall for at least 25 years|
for January 2012 (mm)
Most recent January
at least this wet
|Record lowest January daily maximum temperature|
Lowest daily maximum
in January 2012 (°C)
|Marla Police Station||20.5||on the 10th||21.6||on the 26th in 2000||26||37.2|
|Highest January mean daily maximum temperature for at least 25 years|
Mean daily maximum
for January 2012 (°C)
Most recent January
at least this warm
|Cape Willoughby||23.5||23.6||in 1982||30||21.6|
|Robe Comparison||24.6||25.8||in 1982*||29||22.5|
* note: there are gaps in the historical record at this site, so it is possible a higher value has gone unreported.
|Summary statistics for January 2012|
|Northwest (district 16)|
|Coober Pedy Airport||36.6||43.6||1st||22.5||14.9||31st||7.0|
|Marla Police Station||36.6||-0.6||43.0||1st||23.0||+1.1||15.7||1st||20.6||15.3||high||135%|
|Roxby Downs (Olympic Dam Aerodrome)||36.5||44.7||3rd||21.1||12.6||9th||19.0|
|Far North (district 17)|
|Leigh Creek Airport||35.4||0.0||41.8||19th||21.6||+0.9||14.9||9th||15.8||20.9||average||76%|
|Western Agricultural (district 18)|
|Coulta (Coles Point)||28.9||+1.7||41.6||1st||16.7||+1.9||10.3||12th||4.2|
|North Shields (Port Lincoln AWS)||27.3||34.6||23rd||16.6||12.2||9th||6.6|
|Port Augusta Aero||34.5||44.0||2nd||20.0||12.6||12th||15.6|
|Upper North (district 19)|
|Northeast (district 20)|
|Gluepot Reserve (Gluepot)||32.7||42.4||2nd||16.4||8.2||12th||28.4|
|Lower North (district 21)|
|Clare High School||30.3||38.8||1st||16.1||9.0||12th||15.2|
|Port Pirie Aerodrome||32.7||41.6||2nd||18.6||11.3||12th||36.4|
|Port Pirie Nyrstar Comparison||32.7||+0.7||42.1||1st||19.6||+1.9||12.6||12th||30.4||18.6||high||163%|
|Snowtown (Rayville Park)||32.6||42.1||2nd||15.6||8.1||12th||12.2|
|Yorke Peninsula (district 22A)|
|Kangaroo Island (district 22B)|
|Parndana Cfs AWS||27.3||40.6||1st||14.4||8.9||9th||4.4|
|Adelaide Plains (district 23A)|
|Adelaide (Kent Town)||31.1||+1.9||41.6||1st||19.1||+2.0||14.1||9th||18.0||19.3||average||93%|
|County Light (district 23B)|
|Rosedale (Turretfield Research Centre)||31.9||+1.5||42.0||2nd||17.1||+2.0||10.6||12th||13.6||18.4||average||74%|
|Mount Lofty Ranges (district 23C)|
|Hindmarsh Island AWS||26.4||37.8||23rd||16.4||11.6||6th||4.4|
|Kuitpo Forest Reserve||26.5||37.6||1st||14.7||9.6||15th||44.6|
|Mount Crawford (Mt Crawford AWS)||27.4||37.6||1st||14.3||8.3||12th||58.4|
|Parawa (Second Valley Forest AWS)||25.2||37.4||1st||15.1||10.5||6th||2.2|
|Victor Harbor (Encounter Bay)||26.4||38.4||2nd||15.5||9.6||16th||5.0|
|Upper Murray Valley (district 24A)|
|Loxton Research Centre||32.4||+0.7||41.3||2nd||16.6||+2.1||8.6||12th||28.6||19.4||high||147%|
|Lower Murray Valley (district 24B)|
|Murray Bridge (Pallamana Aerodrome)||30.8||42.6||1st||14.8||9.1||16th||12.6|
|Murray Bridge Comparison||31.1||+2.0||43.3||2nd||15.9||+1.3||10.2||6th||12.8||16.4||average||78%|
|Murray Mallee (district 25A)|
|Upper Southeast (district 25B)|
|Lameroo (Austin Plains)||32.8||42.8||2nd||14.9||6.7||12th||13.6|
|Lower Southeast (district 26)|
|Cape Jaffa (The Limestone)||26.8||+2.3||36.4||23rd||14.8||+1.3||8.1||5th||5.2|
|Mount Gambier Aero||28.1||+2.9||41.7||2nd||13.3||+2.2||5.3||6th||14.2||27.3||average||52%|
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 2 pm on Tuesday 31 January 2012. 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.